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TEXTRON AVIATION INC.
AIRCRAFT DIVISION
WICHITA, KANSAS 67277
Operator Seat Option
ICA Supplement
MODEL NO: 680A
SUPPLEMENT NO: ICA-680A-25-80003A
SUPPLEMENT DATE: 9/4/2020
© TEXTRON AVIATION INC.
Form 2261 Rev 1

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Summary of Contents for Textron Aviation 680A

  • Page 1 TEXTRON AVIATION INC. AIRCRAFT DIVISION WICHITA, KANSAS 67277 Operator Seat Option ICA Supplement MODEL NO: 680A SUPPLEMENT NO: ICA-680A-25-80003A SUPPLEMENT DATE: 9/4/2020 © TEXTRON AVIATION INC. Form 2261 Rev 1...
  • Page 2 Maintenance Manual 25-20-16 page Operator Seat (Option) - Maintenance Practices • Updated to Refer to ICA-680A-25-80003 Appendix C, Martin Baker MB680 Maintenance Manual Refer to Appendix C, Martin Baker MB680 Maintenance Manual Appendix A: Illustrated Parts Catalog Appendix B: Wiring Diagram...
  • Page 3 Page 501 through 599 - Adjustment/Test Page 601 through 699 - Inspection/Check Page 701 through 799 - Cleaning/Painting Page 801 through 899 - Approved Repairs A typical page number: Page 2 of 6 Sep 4/2020 © TEXTRON AVIATION INC. ICA-680A-25-80003A Form 2261 Rev 1...
  • Page 4 This supplement will be completely superseded by the manuals listed in the REVISIONS table when it has been incorporated in all of the manuals. Page 3 of 6 Sep 4/2020 © TEXTRON AVIATION INC. ICA-680A-25-80003A Form 2261 Rev 1...
  • Page 5 Complete ICA Documents The following document(s), in conjunction with this supplement, constitute the Instructions for Continued Airworthiness for the Operator Seat Option on the Cessna Model 680A. All items must be available to the operator at initial delivery. Model 680A Maintenance Manual...
  • Page 6 TEXTRON AVIATION INC. AIRCRAFT DIVISION WICHITA, KANSAS 67277 LIST OF INSTRUCTIONS FOR CONTINUED AIRWORTHINESS Model 680A Maintenance Manual Chapter 25, Equipment/Furnishings Refer to 25-20-16, Operator Seat (Option) - Maintenance Practices Appendix C, Martin Baker MB680 Maintenance Manual Chapter 25, Equipment/Furnishings Refer to Appendix C, ATA 25-20-00, Table of Contents for detailed ATA page numbering.
  • Page 7 Continuous Inspection Program This ICA Supplement does not affect the current inspection program. Airworthiness Limitations Cessna Aircraft Company Model 680A Maintenance Manual, Chapter 4, Airworthiness Limitations, contains the system and airframe limitations for the Model 680A. NOTE: The Airworthiness Limitations section is FAA-approved and specifies maintenance required under Section 43.16 and 91.403 of Title 14 Code of Federal Regulations, unless...
  • Page 8 General The optional operator seat is a Martin Baker Mission Seat ETSO MBCS14550. For all maintenance, parts, and inspections related to the operator seat, refer to ICA Supplement: ICA-680A-25-80003A, Appendix C: Martin Baker MB680 Maintenance Manual. 25-20-16 Page 201 Sep 4/2020 ©...
  • Page 9 TEXTRON AVIATION INC. AIRCRAFT DIVISION WICHITA, KANSAS 67277 SUPPLEMENT NO: ICA-680A-25-80003A APPENDIX A: ILLUSTRATED PARTS CATALOG Refer to Appendix C, Martin Baker MB680 Maintenance Manual © TEXTRON AVIATION INC. Form 2261 Rev 1...
  • Page 10 TEXTRON AVIATION INC. AIRCRAFT DIVISION WICHITA, KANSAS 67277 SUPPLEMENT NO: ICA-680A-25-80003A APPENDIX B: WIRING DIAGRAM MANUAL NOT APPLICABLE © TEXTRON AVIATION INC. Form 2261 Rev 1...
  • Page 11 TEXTRON AVIATION INC. AIRCRAFT DIVISION WICHITA, KANSAS 67277 SUPPLEMENT NO: ICA-680A-25-80003A APPENDIX C: Martin Baker MB680 Maintenance Manual © TEXTRON AVIATION INC. Form 2261 Rev 1...
  • Page 12 No part may be reproduced, disclosed or used except as authorized by contract or other written permission. The copyright and the foregoing restriction on reproduction, disclosure and use extend to all media in which the information may be embodied. Page 1 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 13 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 2 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 14 The validation of the Mission Seat ETSO, MBCS514550, manual is considered complete by similarity to the val- idation of the Mission Seats, MBCS8615 and MBCS8615-1, manual, which was conducted in accordance with Technical Publications Procedures and QA Department document QAI10, in July 2011. ORIGINAL SIGNED COPY KEPT IN MARTIN-BAKER ARCHIVES Page 3 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 15 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 4 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 16 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL AMENDMENT APPROVAL PAGE NO AMENDMENT PAGES INCORPORATED Page 5 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 17 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 6 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 18: Table Of Contents

    Approval page Amendment approval page Contents (this list) Record of revisions Record of temporary revisions Service bulletin list List of effective pages List of equipment modifications Alphabetical list of abbreviations Table of torque loads Introduction Page 7 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 19 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 8 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 20: Record Of Revisions

    Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL RECORD OF REVISIONS ISSUE DATE ISSUE DATE ISSUE DATE DATE INSERTED DATE INSERTED DATE INSERTED Page 9 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 21 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 10 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 22: Record Of Temporary Revisions

    Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL RECORD OF TEMPORARY REVISIONS TEMPORARY PAGE NUMBER ISSUE DATE DATE REMOVED REV. NO. Page 11 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 23 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 12 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 24: Service Bulletin List

    Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL SERVICE BULLETIN LIST SERVICE BULLETIN INCORPORATING Page 13 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 25 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 14 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 26: List Of Effective Pages

    Nov 18 Table of Contents Nov 18 Nov 18 Checks Nov 18 Nov 18 Nov 18 Nov 18 Nov 18 Nov 18 Description and operation Nov 18 Nov 18 Nov 18 Nov 18 Nov 18 Page 15 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 27 1112 Nov 18 Fits and clearances Nov 18 1113 Nov 18 Nov 18 1114 Nov 18 Special tools, fixtures Nov 18 and equipment Nov 18 Illustrated parts list 1001 Nov 18 1002 Nov 18 Page 16 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 28: List Of Equipment Modifications

    Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL LIST OF EQUIPMENT MODIFICATIONS MODIFICATION BRIEF DESCRIPTION Page 17 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 29 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 18 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 30: Alphabetical List Of Abbreviations

    Pound-force lbf/in. Pound-force inch Left hand Number para paragraph Part No. Part Number Quick-release box Reference Right Hand Sect Section Systeme International (d'Units) Special Information Leaflet Spec Specification Unified National Coarse Unified National Fine Page 19 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 31 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 20 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 32: Table Of Torque Loads

    9.0 Nm (80.0 lbf/in.) 1.10 Nm (9.5 lbf/in.) H42-7 7/16-20 UNF 1/2 in. 11.0 Nm (100.0 lbf/in.) 1.60 Nm (14.0 lbf/in.) H42-8 1/2-20 UNF 9/16 in. 17.0 Nm (150.0 lbf/in.) 2.00 Nm (18.0 lbf/in.) Page 21 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 33 18 - 20 lbf/in. 10-32 UNF 2.5 - 2.9 Nm 22 - 26 lbf/in. 1/4-28 UNF 8.8 - 9.4 Nm 78 - 84 lbf/in. 5/16-24 UNF 15.6 - 16.8 Nm 138 - 150 lbf/in. Page 22 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 34 7/16 in. 3.0 Nm (25 lbf/in.) 3.9 Nm (35 lbf/in.) 7/16-20 UNF 9/16 in. 6.0 Nm (50 lbf/in.) 7.4 Nm (65 lbf/in.) 1/2 UNF 5/8 in. 8.0 Nm (70 lbf/in.) 10.2 Nm (90 lbf/in.) Page 23 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 35 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 24 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 36 The seat assembly requires visual and functional checks. These checks are split into “before flight checks” and checks at “500 flight hours or yearly” (whichever occurs first). Refer to “CHECKS” on page 501. Scheduled lubrication is not necessary as dry film lubricant is used during assembly. Page 25 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 37 Install - Correctly attach one item to another. Replace - Remove an item and fit a new or maintained item. Disconnect - Uncouple or detach cable, pipelines or controls. Connect - Reverse of disconnect. Page 26 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 38 Maintenance Block. Specifications quoted are to British Standard and alternative materials should not be substituted for those listed without prior approval of the users governing authority. H. Units of weight, torque and pressure. The Maintenance Manuals gives weight, torque loads and pressures in Imperial units. Page 27 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 39 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 28 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 40 Remove the armrests............Page 1 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 41 Install the 5-point harness, headrest, guard and covers....... . . Page 2 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 42 Lumbar cushion..............1113 Page 3 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 43 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 4 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 44: Description And Operation

    The seat is positioned fore/aft facing for take-off and landing. The mission seat has the parts that follow: 5-point harness Harness lock/unlock lever Raise/lower lever Recline lever Fore/aft lever Rotation lever Floor attachments Adjustable headrest Adjustable armrests Cushions. Page 001 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 45: Technical Characteristics And Features

    In the UNLOCK condition the locking reels unlock the shoulder straps to allow the occupant to move forward and turn in the seat, unless the movement is rapid. Rapid movements of the shoulder straps cause the locking reels to lock. Page 002 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 46: Raise/Lower Lever

    10 degrees below the horizontal. In the stowed position, the armrests are vertical and pushed behind the backrest assembly. J. Cushions Mission seats have three cushions as follows: Sitting cushion assembly Back cushion assembly Lumbar cushion. Page 003 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 47: Function

    When the new angle is set, the headrest is released and an internal spring pushes it back to the locked position. H. Armrest adjustment The armrest is adjusted by turning the adjustment rod at the front of the armrest. Page 004 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 48: Cushions Installation

    The sitting cushion is attached to the bucket assembly with touch and close fasteners. The cushion has tabs at the front and sides for the 5-point harness lap straps and negative g strap to pass through. Page 005 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 49 ADJUSTMENT SCREW QUICK RELEASE SITTING CUSHION HARNESS LOCK/ UNLOCK LEVER BUCKET ASSEMBLY HARNESS STRAP TABS FORE/AFT LEVER LOWER FRAME CORNER ATTACHMENT LOCKING PLUNGERS TURNTABLE LOCKING PIN MBI43556-02 Fig. 1 Mission seat MBCS14550 (Sheet 1) Page 006 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 50 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL RECLINE LEVER RAISE/LOWER LEVER VERTICAL GAS STRUT ROTATION LEVER MBI43557-02 Fig. 1 Mission seat MBCS14550 (Sheet 2) Page 007 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 51 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 008 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 52: Testing And Fault Isolation

    (e) If the shoulder harness reel does not lock when the harness lock/unlock lever is in the down (LOCK) position, replace the 5-point harness (10). (f) If the reel operating cable is broken, replace the 5-point harness (10). Page 101 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 53: Height Checks

    (a) Operate the fore/aft adjustment lever (355) and make sure the floor locking plungers (195) freely retract. (b) Operate and hold the fore/aft adjustment lever (355), make sure the seat moves backwards and forwards freely over the full range of travel. Page 102 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 54: Recline Checks

    If the recline locking pins (720) do not release or engage when the recline lever (375) is operated: (a) Replace the recline cable assembly (430), refer to “DISASSEMBLY” on page 301 and “ASSEM- BLY AND STORAGE” on page 701. (b) Do step D. (1) again. Page 103 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 55: Rotational Checks

    If the locking plunger (500) does not release or engage when the rotate lever (645) is operated: (a) Replace the rotate cable assembly (665), refer to “DISASSEMBLY” on page 301 and “ASSEM- BLY AND STORAGE” on page 701. (b) Do step E. (1) again. Page 104 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 56: Maintenance Operations

    Do the checks at 500 flight hours or yearly (whichever occurs first) Replace a shop replaceable unit To change the aircraft seating configuration. 3. Tools, Equipment and Materials A. Tools - None B. Equipment - None C. Materials - None Page 201 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 57: Installation

    Push the four locking pins (2) fully down to engage the floor rails (6). Make sure the tapered plungers (3) are correctly fitted with their tapered ends located in the large drilling within the locking pins (2). Page 202 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 58: Removal

    Release the tapered plunger (3). Adjust the position of the seat until the four corner attachments (1) are free and the seat can be lifted out from the floor rails (6). Page 203 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 59 MISSION SEAT ETSO MB680 MAINTENANCE MANUAL STEP 1 SEAT POSITIONED ABOVE RAILS STEP 2 SEAT INSTALLED IN RAILS. LOCKING PINS IN THE UP POSITION MBI43559-01 Fig. 1 Install the seat (Sheet 1 of 2) Page 204 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 60 MISSION SEAT ETSO MB680 MAINTENANCE MANUAL STEP 3 LOCKING PIN UP , SEAT UNLOCKED FROM RAIL STEP 4 LOCKING PIN DOWN , SEAT LOCKED TO RAIL MBI43560-01 Fig. 1 Install the seat (Sheet 2 of 2) Page 205 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 61 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 206 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 62: Disassembly

    For disassembly of the seat, refer to step 2. thru step 3. 2. Tools, Equipment and Materials. A. Tools - Standard mechanic’s set of tools. B. Special tools - None. C. Materials - None. Page 301 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 63: Procedure

    (16) If necessary, move the harness lock/unlock lever to the down (LOCK) position and connect the ball end of the cable to the harness lock/unlock lever. (17) Remove the two nuts (135), spacers (130) and bolts (125), and remove the guard (90) from the bucket assembly (745). Page 302 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 64: Remove The Armrests

    (e) Hold the bucket assembly in position to stop it moving UP under gas strut pressure, then remove the vertical lock pin housing (515), vertical lock plunger (505) and spring (510) from each of the lower frames (810) and (815). Page 303 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 65: Remove The Height Control Gas Struts

    SUPPORT THE BUCKET ASSEMBLY BEFORE YOU REMOVE PARTS. IF THE BUCKET ASSEMBLY IS NOT SUPPORTED IT CAN DROP. IF THE BUCKET ASSEMBLY DROPS IT CAN CAUSE AN INJURY. Support the bucket assembly before removing parts. Page 304 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 66: Remove The Bucket Assembly From The Seat Structure

    Remove the four nuts (410), bolts (415) and two lever brackets (405) from the bucket assembly (745). (k) Remove the two nuts (455) and gas strut anchor pins (450) from the bucket assembly (745). Page 305 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 67: Remove The Armrest Spigots

    (315) and feet (285). (e) Remove the two rubber washers (225) or (290) from each of the feet (220) or (285). (f) Remove the four nuts (185) and retaining spigots (180) from the carriage floor (170). Page 306 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 68: Disassemble The Seat Structure

    (a) Remove the split pin (330), claw pin (325) and packer (335) from the rear of the lower LH frame (810). (b) Remove the split pin (345), clevis pin (340) and top floor fitting (320) from the rear of the lower LH frame (810). Page 307 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 69 (a) Remove the split pin (265), claw pin (260) and packer (270) from the front of the lower LH frame (810). (b) Remove the split pin (280), clevis pin (275) and top floor fitting (255) from the front of the lower LH frame (810). Page 308 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 70: Cleaning

    B. Heavy accumulations of dirt should be wiped off with a clean, lint-free cloth. Do not use materials which produce loose fibres. C. Remove the 5-point harness to prevent contamination when cleaning operations take place near the 5- point harness or inertia reel. Page 401 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 71: Tools, Equipment And Materials

    Local Supply Cleaning 5-point harness webbing, (Dishwasher or laundry, headrest cover, armrest covers, household quality) rear-base cover, back cushion assembly, lumbar support pad and sitting cushion cover Solvent MIL-PRF-680 Local Supply Cleaning metal surfaces Page 402 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 72: Procedure

    ONLY USE A MIXTURE OF WARM WATER AND SOAP TO CLEAN THE FABRIC OF THE 5-POINT HARNESS. INCORRECT CLEANING OR DRYING OF THE 5-POINT HARNESS CAN DAMAGE THE HARNESS FABRIC. IF THE HARNESS FABRIC IS DAMAGED, IT CAN CAUSE DEATH OR INJURY. Page 403 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 73 Make sure the temperature of the water is not more than 100° F (38° C). Let the 5-point harness dry. Install the 5-point harness, refer to “ASSEMBLY AND STORAGE” on page 701. Page 404 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 74: Checks

    (a) Installation Date - The month and year in which the LRI was removed from the original unopened packaging and installed onto the seat. (b) Removal Date - The ‘Installation Date’ plus the ‘Installed Life’. Page 501 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 75: Tools, Equipment And Materials

    Part No. Source Application Digital calliper Local Supply Protrusion of floor locking plungers Inspection mirror Local Supply Visual examinations Strong light source Local Supply Visual examinations B. Equipment - None C. Materials - None Page 502 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 76: Before-Flight Checks

    (a) Install a harness lug into the related part of the QRB. Pull the webbing outwards to make sure it is correctly installed. (b) Do para step (a) again for each of the remaining three harness lugs. (c) Operate the QRB and make sure the four harness lugs release at the same time. Page 503 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 77 Refer to “TESTING AND FAULT ISOLATION” on page 101. The seat moves backwards and forwards, freely over the full range of travel. Page 504 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 78 ARMREST AND THE SEAT BODY, WHICH CAN CAUSE INJURY TO YOUR FINGERS. Check the operation of the armrests. (a) Move each armrest (580) and spigot (625) to the OUTBOARD position. Make sure the detent plungers (630) prevent initial outboard movement. Page 505 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 79: Checks At 500 Flight Hours Or Yearly (Whichever Occurs First)

    (d) Two vertical gas struts (525) are securely attached to the lower LH frame (810) and lower RH frame (815), and are not damaged or corroded. (e) Carriage floor (170) has no deformation, corrosion or wear. Page 506 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 80 The two spools (875) for the harness inertia reels are securely attached to the backrest assembly (350) and are not damaged or worn. (m) The two armrests (580), armrest screws (585) and armrest covers (605)/(615) are securely at- tached, and are not damaged. Page 507 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 81 Clean the 5-point harness (10) if dirty, refer to “CLEANING” on page 401. (b) The metal lugs are free from burrs, damage or corrosion. (c) The QRB is free from burrs, damage or corrosion. Page 508 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 82 0.010 in., and the smaller diameter goes through the surface of the carriage floor. (c) With your hand, make sure the rotate locking plunger (500) is not loose against its spring (490). Examine the rotate locking plunger (500) for damage. Page 509 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 83 SUDDENLY. YOU CAN BE INJURED IF YOU DO NOT SIT IN THE BUCKET ASSEMBLY WHEN YOU ADJUST THE SEAT HEIGHT. Sit in the seat and lift the raise/lower lever (380) to move the bucket assembly UP to the top position. Page 510 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 84 (e) Operate the recline lever (375) and make sure the two seat recline plungers (720) retract freely. (f) Operate the rotate lever (645) and make sure the locking plunger (500) retracts freely. (g) If a plunger does not retract, refer to “TESTING AND FAULT ISOLATION” on page 101. Page 511 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 85 - Cushion back - front (55) and cushion back - rear (60) - 5-point harness (10) - Lumbar support (35) - Sitting cushion assembly (65) - Cover assembly (140). N. Install the seat, refer to “MAINTENANCE OPERATIONS” on page 201. Page 512 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 86 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 0.440 INCHES (11.18mm) 0.250 INCHES (6.35mm) MINIMUM MAXIMUM LOCKING PLUNGER RETRACTED LOCKING PLUNGER EXTENDED MBI21463-01 Fig. 1 Locking plungers Page 513 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 87 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 514 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 88: Repair

    Cleaning/Degreasing (Refer to SILMB518) Alocrom 1200 Pt A P35260 Local Supply Corrosion protection (Brush) Alocrom 1200 Pt B P35261 Local Supply Corrosion protection (Brush) Epoxy primer P38837 Local Supply Corrosion protection (BS2X34 Type B) Page 601 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 89: Procedure

    Drill a 0.125 in. diameter hole in the end of the crack, make sure the crack end is completely removed. Remove burrs or sharp edges from the repair area. Make sure all swarf is removed from the seat. Page 602 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 90 Apply Epoxy Primer to the exposed areas of the crack and hole. Install the cushion back - rear (60), cushion back - front (55) and sitting cushion assembly (65). Refer to “ASSEMBLY AND STORAGE” on page 701. Page 603 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 91 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 604 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 92: Assembly And Storage

    Table 1: Materials Nomenclature Part No. Source Application Grease, ASG 64 P33297 (MIL-G-2164D) Local Supply Lubrication of springs Adhesive, RTV 3145 P34052 Local Supply Plastic end caps Loctite 222 P33262 (ASF 1737A) Local Supply Thread locking Page 701 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 93: Procedure

    (13) Install each of the eight thrust bearings (475) to bottom of the seat structure with a bolt (480) and nut (485). (14) Install the rear base cover (145) on the lower LH an RH frames (810) and (815) with four bolts (155) and nuts (160). Page 702 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 94: Assemble The Carriage Floor

    - The carriage floor plunger (175) is installed in the middle of the carriage floor (170) web - The inner edge of the carriage floor (170) upper surface engages the two claw assemblies (465). Page 703 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 95: Install The Armrest Spigots

    - Install the bottom end of each recline gas strut (685) to the related side of the bucket assembly (745) with a clevis pin (695), spacer (690) and split pin (700). - Install the two recline plunger assemblies in the sides of the backrest assembly (350), refer to step H., para (2). Page 704 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 96: Install The Bucket Assembly On The Seat Structure

    AND APPLY AS SHOWN IN THE INSTRUCTIONS OF THE MANUFACTURER. - Apply a thin coat of ASG 64 to the spring (490). - Install the spring (490) and locking plunger (500) in the lock pin housing (495). Page 705 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 97 - Install the threaded end of the recline cable assembly (430) to the crossbeam (part of the bucket assembly (745)) with the nut (440). - Install the cable ball end to the recline lever (375). Page 706 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 98 - Install the fore/aft lever assembly (355) and spacer (360) to the LH lever bracket (405) on the bot- tom of the bucket assembly with the clevis pin (365) and split pin (370). - Install the ball end of the fore/aft cable assembly (420) on the fore/aft lever assembly (355). Page 707 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 99: Install The Armrests

    K. Install the 5-point harness, headrest, guard and covers. (Ref. Fig 1 and IPL Fig 1, Sheets 1, 4, 9) If the 5-point harness (10) has been cleaned, make sure it is fully dry. Position the 5-point harness (10) on the seat. Page 708 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 100 If a new guard (90) is being installed, install two new rivets (95). (14) Put the reel operating cables rearwards through the hole on the LH side of the guard (90). (15) Install the grommet (30) over the reel operating cables and onto the guard (90). Page 709 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 101 (350) with a bolt (100), spacer (105) and nut (110). (21) Install the cover assembly (140) to the seat structure. (22) Install the seat in the aircraft, refer to “MAINTENANCE OPERATIONS” on page 201. Page 710 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 102 FRONT VIEW OF SEAT SHOWN CABLE ASSY INERTIA REEL CABLE ASSY ROTATE CONTROL CABLE ASSY RECLINE CONTROL CABLE ASSY FORE AFT CONTROL CABLE ASSY HEIGHT CONTROL MBI21414-01 Fig. 1 Cable routing (Sheet 1 of 3) Page 711 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 103 INERTIA REEL CABLE ASSY ROTATE CONTROL CABLE ASSY RECLINE CONTROL CABLE ASSY FORE AFT CONTROL CABLE ASSY HEIGHT CONTROL SECTION BOTTOM VIEW OF SEAT SHOWN MBI21415-01 Fig. 1 Cable routing (Sheet 2 of 3) Page 712 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 104 MB680 MAINTENANCE MANUAL SECTION CABLE ASSY INERTIA REEL CABLE ASSY ROTATE CONTROL CABLE ASSY RECLINE CONTROL CABLE ASSY FORE AFT CONTROL CABLE ASSY HEIGHT CONTROL MBI21416-01 Fig. 1 Cable routing (Sheet 3 of 3) Page 713 25-20-00 ICA-680A-25-80003A Sep 4/2020...
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  • Page 106 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL FITS AND CLEARANCES Unassigned. Page 801 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 107 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 802 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 108 Inspection mirror Local Supply Visual examinations Strong light source Local Supply Visual examinations 2. Fixtures A. No fixtures are required to maintain this equipment. 3. Equipment No special equipment is required to maintain this equipment. Page 901 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 109 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK Page 902 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 110 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL ILLUSTRATED PARTS LIST Page 1001 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 111 Abbreviations, Acronyms and symbols - These abbreviations are used in Martin-Baker parts lists: Left hand Non-procurable Revision (when found in the left margin) Revision (when found in the margin of the Configuration Change Summary only) Right hand For reference only Page 1002 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 112 EFF CODE column. Effectivity codes are letters A through Z but not I or O. A part shown with an effectivity code is only used in the top number that has the same effectivity code. Parts which do not have effectivity codes refer to the figure in which they appear. Page 1003 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 113 COLOUR CODE SPECIFICATION Colour Part No Nomenclature Description Code MBCS14561 LUMBAR SUPPORT PAD REPLIN TOSCHI BLACK MBCS14557 CUSHION BACK REPLIN TOSCHI BLACK MBCS14554 SITTING CUSHION REPLIN TOSCHI BLACK MBCS14561 LUMBAR SUPPORT PAD REPLIN TOSCHI BLACK Page 1004 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 114 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL DETAILED PARTS LIST Page 1005 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 115 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 5 x2 45 x2 MBI21464-01 Fig. 1 Mission seat (Sheet 1 of 14) Page 1006 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 116 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL MBI21465-01 Fig. 1 Mission seat (Sheet 2 of 14) Page 1007 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 117 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 155 x4 160 x4 MBI21466-01 Fig. 1 Mission seat (Sheet 3 of 14) Page 1008 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 118 MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 100 x2 110 x2 105 x2 135 x2 125 x2 130 x2 25 x2 95 x2 20 x2 15 x2 MBI21467-01 Fig. 1 Mission seat (Sheet 4 of 14) Page 1009 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 119 MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 605 LH 615 RH 610 x3 LH 620 x3 RH RH SHOWN LH SIMILAR 660 x2 655 x2 650 x2 MBI21468-01 Fig. 1 Mission seat (Sheet 5 of 14) Page 1010 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 120 670 x2 720 x2 730 x2 740 x2 675 x2 695 x2 680 x2 120 x2 690 x2 685 x2 700 x2 LH SHOWN RH SIMILAR MBI21469-01 Fig. 1 Mission seat (Sheet 6 of 14) Page 1011 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 121 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL MBI21470-01 Fig. 1 Mission seat (Sheet 7 of 14) Page 1012 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 122 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 440 x2 410 x2 410 x2 MBI21471-01 Fig. 1 Mission seat (Sheet 8 of 14) Page 1013 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 123 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 880 x2 885 x2 875 x2 770 x2 780 x2 755 x2 805 x3 755 x2 MBI21472-01 Fig. 1 Mission seat (Sheet 9 of 14) Page 1014 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 124 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 870 x2 865 x2 845 x2 840 x2 860 x2 855 x2 835 x2 850 x2 MBI21473-01 Fig. 1 Mission seat (Sheet 10 of 14) Page 1015 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 125 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL MBI21474-01 Fig. 1 Mission seat (Sheet 11 of 14) Page 1016 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 126 Martin-Baker MISSION SEAT ETSO MB680 MAINTENANCE MANUAL 575 x4 470 x8 560 x2 555 x2 570 x4 550 x2 485 x8 475 x8 480 x8 MBI21475-01 Fig. 1 Mission seat (Sheet 12 of 14) Page 1017 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 127 345 x2 330 x2 255 x2 335 x2 REAR RH SHOWN FRONT LH SIMILAR 340 x2 325 x2 320 x2 FRONT RH SHOWN REAR LH SIMILAR MBI21476-01 Fig. 1 Mission seat (Sheet 13 of 14) Page 1018 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 128 MISSION SEAT ETSO MB680 MAINTENANCE MANUAL FRONT RH SHOWN REAR LH SIMILAR 210 x2 215 x2 185 x4 180 x4 FRONT LH SHOWN REAR RH SIMILAR MBI21477-01 Fig. 1 Mission seat (Sheet 14 of 14) Page 1019 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 129 . . Bolt, mush HD 1/4-28 UNF P32334 . . Nut, self-lock H42-4 1/4-28 UNF A114-1/2B . . Bolt, mush HD 6-32 Cres MBCS8904 . . Spacer P32331 . . Nut, self-lock H42 L06 6-32 UNC - item not illustrated Page 1020 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 130 . . Pin, split 1/16 dia x 0.37 in. MBCS8960 . . Packer, lower side frames SP4Z-A10 . . Pin, clevis 5/32 dia x 0.70 in. SP90C3 . . Pin, split 1/16 dia x 0.37 in. - item not illustrated Page 1021 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 131 . . Nut, self-lock H42L08 8-32 UNC A104-1/2 C . . Bolt, Hex HD 8-32 UNC MBCS12272 . . Cable assembly, fore/aft P32334 . . . Nut, self-lock H42-4 1/4-28 UNF - item not illustrated Page 1022 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 132 A104-15E . . Bolt, hex HD 1/4-28 UNF x 2.10 in. MBCS6952 . . Spacer, locking P32334 . . Nut self lock H42-4 1/4-28 UNF MBCS7121 . . Beam middle - item not illustrated Page 1023 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 133 SP90C3 . . Pin, split 1/16 dia x 0.37 in. SP4Z-A11 . . Pin, clevis 5/32 dia x 0.75 in. SP90C3 . . Pin, split 1/16 dia x 0.37 in. - item not illustrated Page 1024 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 134 . . Bolt, mush HD 1/4-28 UNF P32334 . . Nut, self-lock H42-4 1/4-28 UNF A104-15E . . Bolt, hex HD 1/4-28 UNF x 2.10 in. MBCS6952 . . Spacer, locking - item not illustrated Page 1025 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 135 . . Nut, self-lock H42-4 1/4-28 UNF MBCS6103 . . Spool, -ve G-reel A114-4E . . Bolt, mush HD 1/4-28 UNF x 1.00 in. P32334 . . Nut, self-lock H42-4 1/4-28 UNF - item not illustrated Page 1026 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 136 QRB. Make sure the lug is secure. Raise the negative-g strap up between the legs and engage the lug into the bottom lock of the of the QRB. Make sure the lug is secure. Page 1101 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 137 5. Normal egress procedure Vacate the seat as follows: Turn the outer cover of the Quick Release Fitting (QRB) in either direction to release the shoulder straps, lap strap and negative g strap lugs. Vacate the seat. Page 1102 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 138 MECHANISM. THE RECLINE MECHANISM HAS TWO GAS SPRINGS AND CAN MOVE SUDDENLY. DAMAGE TO THE SEAT CAN OCCUR IF YOU DO NOT SIT IN THE BUCKETASSEMBLY WHEN YOU ADJUST THE RECLINE MECHANISM. Lift and hold the recline lever. Page 1111 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 139 E. Rotation adjustment Turn the seat as follows: Lean back in the seat. Push and hold the rotate lever backwards. Turn the seat to the required position. Page 1112 25-20-00 ICA-680A-25-80003A Sep 4/2020...
  • Page 140 Lumbar cushion adjustment should be carried out after strapping-in. Make sure the harness lock/unlock lever is in the up (UNLOCK) position. Lean forward and adjust the cushion to the required position. Return to the normal seated position. Page 1113 25-20-00 ICA-680A-25-80003A Sep 4/2020...
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