Guimbal CABRI G2 Flight Manual

Guimbal CABRI G2 Flight Manual

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Helicopter serial N° :
Helicopter registration :
Section 2, 3, 4, 5 and 9 are approved by EASA
Other sections are approved under Hélicoptères Guimbal DOA EASA.21J.211
This flight manual includes the material required to be furnished to the pilot
This manual should not be used for any operation or instruction,
The helicopter's operator is responsible for maintaining this manual in a current
status in accordance with the list of current pages.
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EASA Type certificate N° R.145
by EASA CS 27 and Part 21
unless it is in current status.
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www.guimbal.com
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Summary of Contents for Guimbal CABRI G2

  • Page 1 EASA Type certificate N° R.145 Section 2, 3, 4, 5 and 9 are approved by EASA Other sections are approved under Hélicoptères Guimbal DOA EASA.21J.211 This flight manual includes the material required to be furnished to the pilot by EASA CS 27 and Part 21 This manual should not be used for any operation or instruction, unless it is in current status.
  • Page 2 INTENTIONALLY BLANK Original issue Approved under DOA EASA.21J.211...
  • Page 3: Table Of Contents

    TABLE OF CONTENT Table of content SECTION 0 INTRODUCTION ................1 SECTION 1 GENERAL ..................1-I ....................1-1 NTRODUCTION CABRI G2 ................1-2 HREE VIEW OF THE ..................... 1-3 ESCRIPTIVE DATA ................1-5 YMBOLS AND ABBREVIATIONS ..................1-7 ONVERSION FACTORS SECTION 2 LIMITATIONS ................
  • Page 4 Hélicoptères Guimbal CABRI G2 TABLE OF CONTENT ......................4-14 LIMB ................4-14 RUISE AND EVEL FLIGHT ................4-14 LIGHT TIME MANAGEMENT ........4-15 UEL QUANTITY MANAGEMENT WITH ALTERNATE FUEL .................. 4-16 PPROACH AND LANDING ................4-16 NGINE OTOR SHUTDOWN OFF..............4-16 ISENGAGEMENT WITH ENGINE ......................
  • Page 5: Cabri G2

    Introduction This document is the Pilot Operating Handbook and EASA approved rotorcraft Flight Manual of the CABRI G2 Rotorcraft. The following tables give the list of approved pages and the list of changes. For flight manual supplements tables (approved pages and revisions log), refer to Section 9.
  • Page 6 Hélicoptères Guimbal CABRI G2 INTRODUCTION Page Issue Page Issue number number number number Section 4 10.1 Normal procedures 4-ii 4-10 09.3 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 09.2 4-20 Section 5 Performance 5-ii 09.3 5-10 Original issue Issue 10.1...
  • Page 7 Hélicoptères Guimbal CABRI G2 INTRODUCTION The following table gives the pages approved under DOA EASA.21J.211 : Page Issue Page Issue number number number number Cover Table of content 10.1 Section 0 0-1.B 10.1 Introduction 0-2.B 10.1 0-3.B 10.1 0-10 09.1 0-11 09.3...
  • Page 8 Hélicoptères Guimbal CABRI G2 INTRODUCTION Page Issue Page Issue number number number number Section 7 - Continued 7-15 09.3 Systems description 7-16 7-17 7-18 7-19 7-20 Section 8 09.3 Handling and 8-ii servicing Issue 10 Original issue Approved under DOA EASA.21J.211...
  • Page 9 Hélicoptères Guimbal CABRI G2 INTRODUCTION The reference of this flight manual is J40-001. The revisions are given in the following table : Issue Page Revision object Approval Approval reference (*) number date Original issue 14/12/2007 TC EASA.R.145 approved by EASA letter...
  • Page 10 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference (*) number date Tight 19/05/2009 EASA.R.C.03230 Lockwiring Manifold distributor Note suppression Modified 19/05/2009 Approved under the clutching system authority of DOA description EASA.21J.211 according to FSA-09-003 Typos : - battery...
  • Page 11 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision Approval Approval reference (*) number object date This issue is associated with MOD EPM 10-009. Oil P. indicator 21/07/2010 EASA.R.C.03496 Major modification supplements approval 10031011 2-10 Carb. Heat proc 2-13 Addition of...
  • Page 12 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference (*) number date 2-8/9 CG Update 13/12/2010 Major modification approval 10032992 2-13 Correction D, 2-1, Update 13/12/2010 Approved under DOA 0-1/2/3/5 EASA.21J.211 0-7, 7-8, according to FSA 10-...
  • Page 13 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference (*) number date Performance to 05/03/2013 Major Change be checked in Approval EASA chapter 5 10043929 Winter air flow restrictor check Line shifted from previous page Weighing ref.
  • Page 14 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference number date 3-15, Addition of name 3-16 of colors D, 6-i, Weighing 6-4, 6-5, 6-6 procedure suppression 4-3, 4-4, Daily checks 4-6, 4-7 update 4-9, 4-11, Starting procedure...
  • Page 15 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference number date 09.2 0-2, 0-3, Addition of log of October Approved under DOA 0-4, 0-11, issue & approved , 2015 EASA.21J.211 0-12 pages update 4-19 Title wording Validated for FAA...
  • Page 16 Hélicoptères Guimbal CABRI G2 INTRODUCTION Issue Page Revision object Approval Approval reference number date 09.3 2-1.C Limitations January EASA AFM Approval TCCA , 2017 10060625 2-5.C Wording only pages 0-1, 0-2, Revision tables May 16 Major Change 0-3, 0-4, 2017...
  • Page 17: General

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Section 1 General ....................1-1 NTRODUCTION CABRI G2 ..............1-2 HREE VIEW OF THE ..................1-3 ESCRIPTIVE DATA Main rotor ....................1-3 Tail rotor ....................1-3 Transmission ..................1-3 Powerplant ..................... 1-4 Fuel ......................1-4 ...............
  • Page 18 Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL INTENTIONALLY BLANK 1-ii Original issue Approved under DOA EASA.21J.211...
  • Page 19: Introduction

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Introduction This Flight Manual is designed as an operating guide for the pilot. It includes material required to be furnished to the pilot by EASA CS 27 and Part 21. It also contains supplementary data supplied by the helicopter manufacturer.
  • Page 20: Three-View Of The Cabri G2

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Three-view of the CABRI G2 Original issue Approved under DOA EASA.21J.211...
  • Page 21: Descriptive Data

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Descriptive data Main rotor Type ............. Articulated, soft-in-plane Number of blades ................. 3 Diameter ..................7,20 m (23.6 feet) Nominal rotor speed ..............530 RPM Blade chord ................180 mm (7.1 in) Tail rotor Type ..................
  • Page 22: Powerplant

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Powerplant Model ............. Textron Lycoming O360-J2A with STC EASA 10015311, initially EASA.E.S.01001 / STC FAA SE03495NY Type ......Four cylinders, horizontally opposed, direct drive, air cooled, normally-aspirated, carburetor-equipped, one magneto and one electronic ignition system Displacement ..................
  • Page 23: Symbols And Abbreviations

    Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Symbols and abbreviations Symbol or abbreviation Designation Speeds CAS ................. Calibrated airspeed IAS................Indicated airspeed TAS .................. True airspeed ................. Never-exceed speed Vy ..............Best rate-of-climb speed Meteorology ISA............ International standard atmosphere OAT ..............Outside air temperature P ................
  • Page 24 Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL Fuel AKI = (RON + MON)/2 ..........Anti-Knock Index MON ..............Motor Octane Number RON .............. Research Octane Number RVP ............... Reid Vapor Pressure Miscellaneous BB .................. Battery breaker CPU ..............Central processing unit H/V ..................
  • Page 25: Conversion Factors

    SECTION 1 CABRI G2 GENERAL Conversion factors Note : The Cabri G2 EPM display can be set to either Metric or Imperial units. Refer to page 7-13. Metric to Imperial/US units Multiply ........By ........To obtain millimeters (mm) ......0,0394 ....... inches (in) meters (m) ........
  • Page 26 Hélicoptères Guimbal SECTION 1 CABRI G2 GENERAL INTENTIONALLY BLANK Issue 07 Original issue Approved under DOA EASA.21J.211...
  • Page 27: Limitations

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Section 2 Limitations ................... 2-1 ENERAL LIMITATIONS ............2-2 OLOR CODE FOR INSTRUMENT MARKINGS ............... 2-3 LIGHT ENVELOPE LIMITATIONS Altitude limitation ..................2-3 Outside air temperature limitation ............2-3 Airspeed limits ..................2-4 Rotor speed limits ..................
  • Page 28 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS INTENTIONALLY BLANK 2-ii EASA Approved Original issue...
  • Page 29: General Limitations

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS The information in section 2, Limitations, is approved by EASA. General limitations Flight rules Approved for VFR. Supplement for night VFR is mandatory. Aerobatic flight is prohibited. Voluntary in-flight engine shut down is prohibited.
  • Page 30: Color Code For Instrument Markings

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Color code for instrument markings Indicates operating limits. The pointer should not enter red zones or exceed red limits during normal operation. Red cross Indicates power-off V -hatch Yellow or Precautionary or special operating procedure...
  • Page 31: Flight Envelope Limitations

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Flight envelope limitations Altitude limitation Maximum operating altitude (Zp) ..........13 000 ft Outside air temperature limitation Maximum temperature ............ISA + 30°C limited to + 45°C Minimum operating temperature ..........- 20°C Minimum storage temperature ............
  • Page 32: Airspeed Limits

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Airspeed limits power-on ................. 130 kt IAS -2 kt IAS per 1000 feet Zp power-off ................. 110 kt IAS -2 kt IAS per 1000 feet Zp Caution range ..............0 – 45 kt IAS...
  • Page 33: Powerplant Limitations

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Powerplant limitations Operating limitations Engine speed Maximum engine speed ............2700 RPM Normal range ..............2585-2700 RPM Minimum engine speed, power-on......... 2585 RPM Temperature Maximum cylinder head temperature (CHT) ......... 260°C (500°F) Maximum recommended CHT for shut down ....... 180°C (356°F)
  • Page 34 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Fuel Maximum tank capacity ..............170 L (45 U.S. gal) Unusable fuel quantity ..............1.5 L (0.4 U.S. gal) Caution : Do not rely on fuel quantity indication when LOW FUEL light is ON or EPM warning is active.
  • Page 35 Oil quantity Oil sump capacity ................5.7 L (6 U.S. Quarts) Minimum oil quantity for take-off ............. 3.8 L (4 U.S. Quarts) Gearboxes oil Use Hélicoptères Guimbal oil HG30-0039 (85W140). Issue 10.1 EASA Approved 2-7.B...
  • Page 36 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Indicated power on MLI The Multiple Limits Indicator displays the engine power status, based on engine manifold absolute pressure. The indicator (pointer and digits) displays power delivered by the engine in terms of margin to the first of these limits whose relative positions vary with engine inlet air temperature and altitude: •...
  • Page 37: Transmission Limitations

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Power indication FLO limit mode PWR limit mode Limitations: Red radial mark with arc Full throttle power Red radial mark Maximum rated power 5 minutes Max. 30 kt IAS – AVGAS Yellow arc threshold...
  • Page 38: Weight And Balance Limitations (Imperial Units)

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Weight and balance limitations (Imperial units) Maximum Gross Weight ..............1543 lb Longitudinal Weight and Balance diagram 1500 1400 1300 1200 1100 1000 78.7 Fore Point 1 ............1036 lb ....83.5 in Point 2 ............
  • Page 39: Weight And Balance Limitations (Metric Units)

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Weight and balance limitations (metric units) Maximum Gross Weight ..............700 kg Longitudinal Weight and Balance diagram 1900 1950 2000 2050 2100 2150 Fore Point 1 ............470 kg .... 2120 mm Point 2 ............500 kg .... 2120 mm Point 3 ............
  • Page 40: Sensors Failures

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Sensors failures When the MASTER is switched on, the EPM carries out a self-test and displays a test page (refer to page 7-13). Only one flight should be performed after one of following parameters are displayed “Failed”, with following restrictions :...
  • Page 41: Placards

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Placards ▪ On cabin ceiling: Issue 10 Original issue EASA Approved 2-13...
  • Page 42 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS ▪ Above the fuel tank filler cap : The following placard can still be used if unleaded fuels are not used : Under cabin heater control : ▪ CLOSE IN CASE OF ENGINE FIRE ▪...
  • Page 43 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS ▪ Forward luggage compartment : MAX. LOAD comply with C.G. limit 5 kg 11 lb ▪ Forward luggage compartment / under pilot seat : AUX. 12V D.C. 13.7 V D.C. 5A protected Main luggage compartment : ▪...
  • Page 44 Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS ▪ Starting S/N 1045 (with MOD 12-010), next to rear bow fitting : Tie down only 2-16 EASA Approved Original issue Issue 10...
  • Page 45: Emergency Procedures

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Section 3 Emergency procedures ....................3-1 NTRODUCTION ..................3-2 OWER FAILURES General ....................3-2 Power failure - hover below 8 feet AGL ..........3-3 Power failure during take-off ..............3-3 Other in-flight power failures ..............3-3 .....................
  • Page 46 Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES INTENTIONALLY BLANK 3-ii EASA Approved Original issue...
  • Page 47: Introduction

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES The information in section 3, emergency procedures, is approved by EASA. Introduction The following emergency procedures describe the actions the pilot must take, relative to the various possible failures that can occur.
  • Page 48: Power Failures

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Power failures General Engine failure can be detected by : • Yaw acceleration, nose to the right, • Engine noise level decreases, • Tachometer needles desynchronization on the EPM (engine decreases) •...
  • Page 49: Power Failure - Hover Below 8 Feet Agl

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Power failure - hover below 8 feet AGL The helicopter will normally exhibit little or no tendency to depart in pitch or roll, hence requiring little correction : Use left pedal input to counter yawing to the right,...
  • Page 50: Ditching

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Note : During an emergency autorotation, always control airspeed carefully. Increasing airspeed above 50 kt IAS makes the landing easier, but requires a longer landing area. Confined landing area : When landing spot is confined, maintain IAS to 30 kt IAS in descent.
  • Page 51: In-Flight Engine Restart

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES In-flight engine restart Attempt engine restart only when the autorotation is stabilized on the trajectory to an appropriate landing area, and sufficient time is available. If successful, power recovery can take only a few seconds.
  • Page 52: Engine Fire

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Engine fire FIRE Engine fire can be detected when the EPM fire warning lights up: On the ground : Shut cabin heater OFF, Shut fuel valve OFF, When engine quits : Switch all switches OFF, Pull rotor brake, Wait for complete rotor stop before evacuating the cabin.
  • Page 53: Electrical Fire

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Electrical fire Can be detected by a strong smell of burning and/or by smoke. Switch alternator OFF, Switch MASTER OFF, Note : EPM and NR lights are no longer powered. Move NR switch to “Backup” position, Use NR lights (Backup position) to monitor rotor speed.
  • Page 54: Tail Rotor Failure

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Tail rotor failure It could consist either in a tail rotor transmission failure, or in a tail rotor loss. This failure can be detected by sudden yaw acceleration - nose to the left - and/or totally ineffective pedals.
  • Page 55: Engine Governor Failure

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Engine governor failure Engine governor failure can be detected by the following : • Rotor/Engine speed is not regulated in green arc and throttle extreme position is not reached, • Rotor/Engine speed changes in level flight, •...
  • Page 56 Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES MLI failure : Detected by the indication on MLI Above 5500 feet Zp, you will always be limited by full throttle, Below 5500 feet Zp, do not exceed 80 kt IAS in level flight to prevent overpower.
  • Page 57 Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Loss of engine speed sensor : Detected by the indication on engine EPM indicator and loss of governor (frozen twist-grip). Refer to NR indicator for engine speed indication, Overtake the governor by firmly gripping the twist-grip,...
  • Page 58: Aural Warnings

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Aural warnings Loud horn warning : A continuous tone warns the pilot when rotor speed approaches low speed limit. An intermittent tone warns the pilot when rotor speed approaches high speed limit.
  • Page 59 Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Parameter Exceeds Corrective actions • If in hover, land or depart in translation • If in translation, reduce power Red arc If indication stays into red arc, LAND AS SOON AS POSSIBLE Once landed, keep nominal NR for cooling •...
  • Page 60: Epm Alarms

    Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Parameter Exceeds Corrective actions Display in Check with LOW FUEL warning light LOW FUEL 10 L If ON : LAND IMMEDIATELY (2.6 U.S. gal) Check ALT switch ON. Battery is not being charged. Turn all non- BATT essential equipment OFF.
  • Page 61: Caution / Warning Lights

    Hélicoptères Guimbal SECTION 2 CABRI G2 LIMITATIONS Caution / Warning lights Light Signification Corrective actions STARTER Starter is Release starter button as needed Amber energized. If stays when Immediately pull the mixture OFF to shut STARTER starter button is the engine down and switch MASTER...
  • Page 62 Hélicoptères Guimbal SECTION 3 CABRI G2 EMERGENCY PROCEDURES Light Signification Corrective actions Check charge indicator on EPM (BATT). If green or white : battery is being charged. CONTINUE FLIGHT. Have the alternator regulator serviced Alternator, after flight. regulator or battery If yellow : battery is not being charged.
  • Page 63: Normal Procedures

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Section 4 Normal procedures ..................... 4-1 ENERAL ..............4-1 IRSPEEDS FOR SAFE OPERATION ......................4-1 OORS ................ 4-2 OORS LOCK AND ANTI THEFT ..................... 4-2 EFORE FLIGHT ................ 4-2 AILY OR PRE FLIGHT CHECKS ..................
  • Page 64 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES INTENTIONALLY BLANK 4-ii EASA Approved Original issue...
  • Page 65: General

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES The information in section 4, Normal procedures, is approved by EASA. General This section contains instructions and procedures for operating the helicopter, from the planning stage through all the mission. Normal and standard conditions are assumed in these procedures.
  • Page 66: Doors-Lock And Anti-Theft

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Doors-lock and anti-theft To unlock / lock the doors, press the corresponding button on the key-ring radio transmitter. Check the flashing strobe light confirmation. If the transmitter is ineffective, check the “Auxiliaries” breaker inside the battery box.
  • Page 67 NORMAL PROCEDURES Note : All castellated nut must be locked by cotter pin. Lockwire must be tight. Torque-seal marks must be intact. Definition of Cabri G2 inspection stations Station 1 : Main rotor blades (each 3) : Clean, particularly at leading-edge Leading edge ......
  • Page 68 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Station 2 : Fuel cap ......Closed secured – and key locked if equipped Navigation lights ................. Check Front and main gear bow condition ..........Check Landing gear pants and skid condition ........Check Skid shoes..................
  • Page 69 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Station 4 : Tripod attachments ..............Check Tail gearbox oil level ....Check – Minimum is mid-sight gage Chip detector ................Locked Pitch lever and rod end ..........Check free-play Horizontal stabilizer ..............Check Rear transmission tube ......
  • Page 70 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Skid shoes.................. Check Right bear paw (if installed) ........... Check, locked Navigation lights ................. Check Open the luggage door, step for main rotor examination : Blade bolts ................. Check Elastomeric thrust bearings ......Check elastomer condition Main rotor hub ..........
  • Page 71: Inter-Flight Check

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Inter-flight check This paragraph describes the inter-flight check that should be carried out in the case described page 4-2. Station 1 : Main rotor blades (each 3) : Leading edge ......hand-check for damage or debonding Right door hinges ..............
  • Page 72 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Station 3 : Left tail boom attachments ............Check Horizontal stabilizer ..........Shake and inspect Rotor duct................... Clean Tail rotor blades ..............No impact Tail skid and attachment ............Check Station 4 : Tripod attachments ..............
  • Page 73: Before Starting Engine

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Before starting engine Harnesses ................Both fastened Cockpit ............. All objects correctly secured Pedals ..................Full travel free Collective ....Friction released, full travel free, then move back down Cyclic ..................Full travel free Breakers ....................
  • Page 74 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Warning : • The clutch may have stayed engaged, or engage unexpectedly, allowing the rotor to turn at starter engagement. • The blades can be very dangerous particularly at low speed, and with gusts or wind.
  • Page 75: Starting The Engine

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Starting the engine Headset, Radio ............... ON if needed Altimeter setting ........Correlated with ATC information Compass heading indication ............Verified Strobe ..................... ON Fuel pump ..........ON, check Fuel pressure increase Manual fuel injections ..............
  • Page 76: Before Take-Off

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Ignition test : Set engine speed to ......2000 RPM (upper purple radial mark) Plasma OFF 5 sec. – maximum drop ..... 300 RPM (lower radial mark) Magneto OFF 5 sec. – maximum drop .......... 100 RPM Set rotor speed ..............
  • Page 77: Take-Off Procedure

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Take-off procedure On clear flat area Apply collective pitch progressively to stabilize hover at 2 feet skid height. Adjust cyclic trim. Check engine parameters in green arcs and warning / caution lights OFF.
  • Page 78: Climb

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Climb Prescribed climb speed is 50 kt IAS. Adjust power to obtain desired rate-of-climb. Maximum allowed power is yellow arc threshold on MLI. If full throttle is reached (100 % FLOW on the MLI), the rotor speed may decrease.
  • Page 79 Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES INTENTIONALLY BLANK Issue 08 EASA Approved 4-15.B...
  • Page 80: Approach And Landing

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Approach and landing Approach with ............50 kt IAS and -500 ft/min Land on clear area The target is ........50 kt IAS / 50 ft AGL / -500 ft/min Flare gently with cyclic to reduce rate of descent and forward speed.
  • Page 81: Training

    SECTION 4 CABRI G2 NORMAL PROCEDURES Training Caution : The Cabri G2 has a very capable rotor, giving her comparatively permissive autorotation characteristics. This allows efficient training and practice, from different situations and using different piloting techniques. Following procedures are given as guidelines and should be followed for best safety.
  • Page 82: Power Failure In Hover In Ground Effect Practice

    Note 1 : If the helicopter is light, it may bounce after a first touchdown. Note 2 : The Cabri G2 has no natural tendency to depart in roll or pitch after failure. No systematic corrective cyclic action is needed.
  • Page 83: Aborting Autorotation Practice

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Aborting autorotation practice If power recovery is decided during autorotation : Roll-in throttle until governor engages, Gradually raise collective pitch to stop autorotation and descent, Control yaw during power recovery with pedals.
  • Page 84: Engine Governor Failure Practice

    Hélicoptères Guimbal SECTION 4 CABRI G2 NORMAL PROCEDURES Engine governor failure practice To simulate an engine governor failure in flight, proceed as follows : Switch-off governor, Adjust twist grip in order to maintain engine/rotor speed in the middle of green arc, Carry out a standard landing.
  • Page 85: Performance

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Section 5 Performance ................. 5-1 IRSPEED CALIBRATION ............5-2 OTOR STARTING AND STOPPING LIMIT ................5-3 EIGHT ELOCITY DIAGRAM ..............5-4 OVER UT OF ROUND FFECT ................5-5 OVER ROUND FFECT = 50 IAS ..............
  • Page 86 Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE INTENTIONALLY BLANK 5-ii EASA Approved Original issue...
  • Page 87: Airspeed Calibration

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE The information in section 5, Performance, is approved by EASA. Airspeed calibration Airspeed indicator calibration 90 100 110 120 130 Indicated Airspeed, kt Notes : Calibrated airspeed is equal to true airspeed at sea level in standard conditions.
  • Page 88: Rotor Starting And Stopping Limit

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Rotor starting and stopping limit Maximum demonstrated wind for rotor start-up or shut-down : 40 kt, including gusts. Caution : When starting or stopping the rotor in strong wind, lower fully the collective to its stop, and keep the cyclic in neutral position.
  • Page 89: Height-Velocity Diagram

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Height-Velocity diagram Height AGL, feet Avoid operation in this area Associated take-off profile 10 20 30 60 70 80 90 IAS, kt Note : With a view to simplicity, the same domain was demonstrated regardless of altitude and temperature.
  • Page 90: Hover Out Of Ground Effect

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Hover Out of Ground Effect 12 000ft Standard atmosphere 10 000ft 8000ft Z max = 14 200 ft 6000ft 4000ft 2000ft Standard atmosphere +30°C 0 ft 470 kg 500 kg 550 kg 600 kg...
  • Page 91: Hover In Ground Effect

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Hover In Ground Effect Z max = 10 800 ft 12 000ft Standard atmosphere 10 000ft 8000ft 6000ft 4000ft Standard atmosphere 2000ft +30°C 0 ft 470 kg 500 kg 550 kg 600 kg...
  • Page 92: Rate Of Climb At Vy = 50 Kt Ias

    Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Rate of climb at Vy = 50 kt IAS To determine the maximum rate of climb, first determine the reduced weight as follows : 1. Locate A on the left curves from outside temperature and pressure altitude, 2.
  • Page 93 Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Reduced weight computation Weight 800 kg 1200 kg 600 kg 1000 kg 400 kg Reduced weight Original issue EASA Approved...
  • Page 94 Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Determine maximum rate of climb as follows : 1. Locate A on the left curves from pressure altitude and outside air temperature, 2. Report A on the right curves and find climb rate from reduced weight.
  • Page 95 Hélicoptères Guimbal SECTION 5 CABRI G2 PERFORMANCE Rate of climb computation Reduced weight 2000 ft/min 3000 ft/min 0 ft/min 1 000 ft/min Rate of climb Original issue EASA Approved...
  • Page 96: Take Off Distance

    Best angle of glide ......0,60 nm per 1000 feet at IAS = 78 kt IAS - 1.3 kt IAS per 1000 feet Zp Sound exposure level Cabri G2 flyover sound exposure level is : 75.7 dB SEL Confidence interval ± 0.3 dB. This measurement was established taking into account Vh = 100 kt IAS.
  • Page 97: Weight And Balance

    Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE Section 6 Weight and balance ..................... 6-1 ENERAL ..........6-3 ENTER OF GRAVITY TANDARD DEFINITIONS ............. 6-4 EIGHT AND POSITION DETERMINATION Issue 08 Original issue Approved under DOA EASA.21J.211...
  • Page 98 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE INTENTIONALLY BLANK 6-ii Original issue Approved under DOA EASA.21J.211...
  • Page 99 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE General The helicopter must only be flown within the weight and balance envelope specified in Section 2. Operation outside these loading limits can result in degraded safety. Note : Due to fuel position, the CG location will vary during the flight, especially laterally.
  • Page 100 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE INTENTIONALLY BLANK Original issue Approved under DOA EASA.21J.211...
  • Page 101: Center Of Gravity, Standard Definitions

    WEIGHT AND BALANCE Center of gravity, Standard definitions The Cabri G2 frame axis are defined as follows : • Z-axis is parallel to the main rotor shaft, positive upward, • X-axis is normal to Z-axis in the plane defined by Z-axis and tail rotor transmission axis, positive rearward, •...
  • Page 102 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE Weight and CG position determination Before each flight, the pilot should determine helicopter gross weight and CG position in order to check that helicopter CG limits shown page 2-8 are not exceeded, and to determine performance (Refer to Section 5).
  • Page 103 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE In Imperial units : Weight Arm X Arm Y Item Mom X Mom Y (lb) (in) (in) Equipped aircraft EW ( AX ( AY ( MX ( MY ( Right 51.2 12.6...
  • Page 104 Hélicoptères Guimbal SECTION 6 CABRI G2 WEIGHT AND BALANCE INTENTIONALLY BLANK Issue 08 Original issue Approved under DOA EASA.21J.211...
  • Page 105: Systems Description

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Section 7 Systems description ....................7-1 IRFRAME General ....................7-1 Landing gear ..................7-1 Seating ....................7-1 ..................7-2 YNAMIC SYSTEMS Main rotor ....................7-2 Tail rotor ....................7-2 Transmission ..................7-3 Flight controls ..................
  • Page 106 Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS INTENTIONALLY BLANK 7-ii Original issue Approved under DOA EASA.21J.211...
  • Page 107: Airframe

    SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Airframe General The Cabri G2 airframe is composed of three sections : • The main fuselage, including cabin, central structure, luggage and fuel compartments. It is all made of composite sandwich. • The engine section, isolated between a front and an aft firewalls.
  • Page 108: Dynamic Systems

    SYSTEMS DESCRIPTIONS Dynamic systems Main rotor The Cabri G2 main rotor is a three-bladed, fully articulated, soft-in plane rotor. The rotor hub is forged from aluminum alloy, and attached to the stainless-steel mast, by a large splines and cones attachment, with a thrust nut.
  • Page 109: Transmission

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Transmission To the tail gearbox Freewheel Primary Thrust transmission bearing Attachment Engine to central structure The primary transmission is composed of a pulley directly bolted to the engine output flange, a poly-V belt transmitting the power, and an upper pulley connected through a freewheeling unit to the gearbox input.
  • Page 110: Flight Controls

    It is equipped with a filler plug / breather, a sight gage and a self-closing magnetic chip detector. Flight controls The Cabri G2 has dual flight controls which includes cyclic stick, collective stick and pedals. Left controls are totally removable, without tools, if needed. They can be stowed in the cabin luggage compartment.
  • Page 111: Engine Installation

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Engine installation Engine The engine is a four-cylinder, direct-drive, carbureted gasoline engine. It is installed in the central compartment, suspended through elastomeric vibration mounts. It moves slightly to control the main transmission belt tension for clutch engagement / disengagement.
  • Page 112: Cooling System

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Cooling system The engine is air-cooled, with an additional oil cooler. Cooling air enters the upper cowling plenum around the mast and gearbox. It is forced by a squirrel-cage blower, directly driven by the engine.
  • Page 113: Electrical Circuit

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Electrical circuit The electrical systems are powered by a 12 V, 25 ampere-hour battery located in the left engine compartment, and a 13.7 V, 60 A alternator controlled by a voltage regulator.
  • Page 114 Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS ALT. Voltage Regulator MASTER Master Regulator relay Ammeter Alternator Master relay Starter BATTERY relay Starter Direct ALT. battery Starter Radios & starter Avionics Plasma PLASMA relay Avionics Ancillaries Gov. Off Gov. Electronic...
  • Page 115: Breaker Panel

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Breaker panel The breaker panel is located on the cabin bulkhead between the two seats. The breakers are marked to indicate their function. They are of push-pull type. Caution : Some systems are grouped on the same breaker.
  • Page 116: Battery Breakers

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Battery breakers Four breakers are located in the battery shelter, two of which are in direct battery : - Remote door locking, - “Magneto disabling during Auxiliaries cranking” function - 13.7 V Aux. socket...
  • Page 117: Electronic Pilot Monitor - Epm

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Electronic Pilot Monitor - EPM Flight screen Engine and rotor Fuel gage / Multiple limit indicator speed indicator fuel flow Fire alarm location Keys Carburetor Cylinder head Engine oil Engine oil Fuel...
  • Page 118: Starting Sequence

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Starting sequence The EPM is powered through the MASTER switch. The functioning synoptic after switching on is as follows: System startup – logo displayed Welcome page – software releases Flight log page...
  • Page 119: Configuration And Settings Page

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Configuration and settings page : Note : Brightness equalization with NAV. light ON adjusts relative instrument panel lighting. With NAV. light OFF, it adjusts relative EAN brightness. Sensors and alarms test page :...
  • Page 120: Start Indicator

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Start indicator In START mode, MLI indicates the throttle position (blue arrow) to assist the pilot to start the engine. Mode deactivation when NR ≥ 420 RPM Mode reactivation when NR ≤ 300 RPM Clock - Stopwatch - Flight time counter The clock is a continuous display.
  • Page 121: Fuel Flow Modes

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Fuel flow modes Three different fuel flow display modes can be selected, by pressing the #3 Key cyclically : - Remaining flight time - Instantaneous fuel flow - Average fuel flow Remaining flight time •...
  • Page 122: Carburetor Heat

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Carburetor heat The Cabri is equipped with a two-mode carburetor heat : • Normal automatic mode (switch on AUTO) : the EPM monitors carburetor temperature and controls the heating valve to keep it outside the yellow zone, •...
  • Page 123: Barc

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS BARC BARC (Fuel and rotor alarm device). It is designed as an alternate mean in case of EPM failure. It should be preferred in case of doubt. When the MASTER is switched ON, the BARC conducts a testing sequence for caution / warning lights on the instrument panel, and the rotor speed horn.
  • Page 124: Other Equipment

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Switch functions : Backup mode : BARC is powered directly by the battery. Central green light is active. Main mode : Normal operation. Green light is inactive. Mute : Mutes the continuous NR horn (self-reactivation).
  • Page 125: Doors Lock / Anti-Theft

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Doors lock / Anti-theft Remote doors lock is provided by a small radio transmitter. It uses a radio security-code to control the cabin doors locks, and enable/disable the engine starter. Note : The starter is enabled when the “Rotor in flying mode” signal is active (see page7-17), whatever the antitheft state.
  • Page 126: Cabin And Amenities

    Hélicoptères Guimbal SECTION 7 CABRI G2 SYSTEMS DESCRIPTIONS Cabin and amenities Luggage compartments A 200 liter luggage compartment is provided in the right side of the fuselage. It can accept two standard trolley cabin suitcases. It is accessible from the outside, through a hinged door, and from the cabin through a small access hole, limited to soft objects.
  • Page 127: Handling And Servicing

    Hélicoptères Guimbal SECTION 8 CABRI G2 HANDLING AND SERVICING Section 8 Handling and servicing ..................... 8-1 ENERAL ......................8-1 ....................8-1 NGINE OIL .................... 8-1 EARBOXES OIL ..................8-1 ROUND HANDLING ................8-2 ARKING AND TIE DOWN ..........8-2 UAL CONTROLS REMOVAL AND INSTALLATION ...............
  • Page 128 Hélicoptères Guimbal SECTION 8 CABRI G2 HANDLING AND SERVICING INTENTIONALLY BLANK 8-ii Original issue Approved under DOA EASA.21J.211...
  • Page 129: General

    CABRI G2 HANDLING AND SERVICING General This section outlines procedures recommended for handling and maintaining the Cabri G2. Every Cabri G2 owner should stay in contact with Hélicoptères Guimbal or approved source to obtain the latest service and maintenance information. Fuel Refer to page 2-6 for approved fuels.
  • Page 130: Parking And Tie - Down

    Hélicoptères Guimbal SECTION 8 CABRI G2 HANDLING AND SERVICING Parking and tie-down Parking the helicopter on a soft surface may cause it to tilt back due to aft center of gravity when empty. In case of doubt, for long time parking, place a hard piece of wood beneath the skid aft tips before removing the wheels.
  • Page 131: Doors Removal And Installation

    Hélicoptères Guimbal SECTION 8 CABRI G2 HANDLING AND SERVICING 3. Align the rod end and install the pin, head pointing rearward. Ensure the head is locked by its backup lock. Install the lock pin. 4. Plug the electrical connector. Doors removal and installation...
  • Page 132: Jump-Starting The Engine

    Hélicoptères Guimbal SECTION 8 CABRI G2 HANDLING AND SERVICING Jump-starting the engine Jump-starting the engine is an acceptable practice in case of a low battery. Only use 12V lead acid battery for jump starting. Proceed in following order: 1. Connect the red cable to helicopter battery plus, 2.
  • Page 133 Hélicoptères Guimbal CABRI G2 omfort in utorotation etter with otor nertia...
  • Page 134 Hélicoptères Guimbal CABRI G2 INTENTIONALLY BLANK...
  • Page 135 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 10-001 A CABRI ® SERVICE LETTER 10-001 A few hints about very cold weather operation It is recommended to keep this letter with the Flight Manual Thanks to its very powerful electronic ignition, which functions even with very low voltage, the Cabri can start autonomously after soaking as low as -20°...
  • Page 136 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 10-001 A Start again the complete sequence as long as needed, 10. While the engine is stabilized at 0 – 5%, then increase to 10 – 20% gradually. However, always remember : ! NEVER insist on the starter after the first sneeze. The engine will NOT start, and the battery will die, ! Inject fuel.
  • Page 137 HG insists on the fact that Flight Manual procedures should be followed for best flight safety. Aerobatic flight, in particular, is forbidden. HG would also like to point out that the Cabri G2 is equipped with a standard reciprocating engine that is not designed for aerobatic, particularly low-G flights : it looses all its power under those conditions.
  • Page 138 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 11-001 A INTENTIONALLY BLANK 2 / 2 Original issue...
  • Page 139 It is recommended to instructors that they insist on following matter during training and that they check it periodically. The Cabri G2 comprises a shrouded tail rotor, usually referred to as a “Fenestron” that was proven to provide excellent maneuverability in every flight condition, in every direction of flight up to 40 kt at least.
  • Page 140 Compared to conventional tail rotors as fitted to most small helicopters, the Cabri G2 Fenestron features a higher disk loading and a shroud that allow a high thrust capability, but with different shape of the curve Pedals position / Tail...
  • Page 141 Hélicoptères Guimbal LETTRE SERVICE CABRI G2 SL 12-001 A INTENTIONALLY BLANK Original issue 3 / 10...
  • Page 142 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 12-001 A 5. Typical situations Shallow approach (see sketches on following pages) A very common situation is a rather shallow approach to a landing spot. Say indicated power is 30 - 40% with an airspeed of 30 - 60 kt, and the string is centered.
  • Page 143 Hélicoptères Guimbal LETTRE SERVICE CABRI G2 SL 12-001 A 3. High yawing rate Æ Æ Æ Æ Loss of control 2. Pilot does not apply sufficient 7KH SRZHU right pedal LQFUHDVHV 1. Fin stalls Fin is at its maximum angle of attack...
  • Page 144 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 12-001 A 4. The pilot adds a large amount of right pedal 7KH SRZHU LQFUHDVHV 2. The pilot adds right 1. Fin lift disappears pedal to compensate Good approach No wind scenario Fin lift...
  • Page 145 Hélicoptères Guimbal LETTRE SERVICE CABRI G2 SL 12-001 A 1. Fin stalls 7KH SRZHU LQFUHDVHV 3. High yawing rate Æ Æ Æ Æ Loss of control Its sideslip increases with decreasing airspeed The helicopter is stabilized in yaw. Approach with...
  • Page 146 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 12-001 A 3. The pilot 7KH SRZHU LQFUHDVHV adds only a moderate amount of right pedal No fin lift No fin lift Wind from left 1. The pilot already applies some amount of...
  • Page 147 Hélicoptères Guimbal LETTRE SERVICE CABRI G2 SL 12-001 A Note 1 : Though it has been shown that an approach with right-hand wind requires more awareness, it gives a small benefit in terms of hovering performance. It may thus be preferred.
  • Page 148 Advice 3 : When practicing spot-turns at low height above the ground, always do it “on the power pedal” – to the right in the Cabri G2 case. Then raising the collective in case of problem will stop the spin.
  • Page 149 In order to propose alternatives to AVGAS 100 LL, both in terms of availability and operating costs, Helicopteres Guimbal has certified grades of unleaded gasoline for use with the Cabri G2, taking into account evolution of supply chain in the medium term. Therefore : - Unleaded AVGAS UL91, designed to replace AVGAS 100 LL in Europe, can be used with complete interchangeability.
  • Page 150 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 13-001 A This Service Letter details Flight Manual requirements and give simple ways to comply. The limitations given by the Flight Manual belong to two categories : Limitations concerning supply : 1. Standards : Specified standards correspond to those that apply to automotive gasoline in Europe (EN228) and the US (ASTM D4814).
  • Page 151 Hélicoptères Guimbal LETTRE SERVICE CABRI G2 SL 13-001 A Limitations concerning flight operation : 4. Fuel volatility Automotive gasoline volatility is higher than that of AVGAS. This can lead to power losses due to vaporization in the circuit if altitude and fuel temperature limitations are exceeded.
  • Page 152 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 13-001 A Caution : Gasoline has a very high isolation capacity and is therefore prone to developing static electricity that poses a high risk of self-inflammation during handling. This is particularly serious when the weather is dry.
  • Page 153 Always refer to the up-to-date Flight Manual, and particularly to the section "Limitations". Introduction Several operators of the Cabri G2 have experienced random failures of the throttle position sensor. Such failure may lead, under some specific circumstances, to a degradation of the engine governor behavior and increased pilot workload.
  • Page 154 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 15-001 A Symptoms of a throttle position sensor failure When failed, the throttle position sensor sends: - an off-range signal or, - an erroneous signal, typically frozen, which stays within nominal range. Displayed Symptoms...
  • Page 155 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 15-001 A Behavioral symptoms of sensor failure If the throttle sensor sends an erroneous signal within the nominal range, no display will warn the pilot. In that case, the engine governor may produce oscillations of the throttle and the engine speed when the rotor is desynchronized.
  • Page 156 Hélicoptères Guimbal SERVICE LETTER CABRI G2 SL 15-001 A INTENTIONALLY BLANK 4 / 4 Original issue...

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