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B.
Electronic Horizontal Situation Indicator (EHSI) [i.e. - Meggitt MAGIC EFIS Navigation Display (ND)]
The Navigation Display (ND) is, like the Meggitt Primary Flight Display (PFD), a microprocessor-
based color, liquid crystal (LCD) display system. Information displayed includes Navigation Data,
Autopilot Data, Radio Tuning, Airspeed, Altitude, Attitude, Vertical Speed, Heading and Instrument
Landing System data. The information is displayed via a series of predefined display formats (HSI,
ARC, MAP). In addition, the ND includes built-in test, performance and health monitoring functions
and display brightness control.
WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN
SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER
AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION
- SUPPLEMENTARY PUBLICATIONS.)
Descriptions of the operator controls and basic operating modes and screens are in the appropriate
Pilot's Operating Handbook.
(1) Troubleshooting
See Chart 3. See also Appendix 1 (grid 5K1).
(2) Basic Functional Test
The following test procedure should be performed with the aircraft in a suitable position to
receive valid VOR/ILS/GPS/DME signals. If this is not possible, then use the appropriate test
sets to simulate the signals as required.
CAUTION: IF, DURING THE FOLLOWING TEST, ANY COMPONENT DOES NOT
(a) Before applying power, verify proper voltage inputs and ground connections as well as all
system interfaces.
(b) Start the ND in Test Mode by pressing and holding the MNU Pushbutton while applying
power until the Initialization page is shown. Verify that the Initialization page displays
'MERIDIAN NAVIGATION DISPLAY' at the top of the screen and is replaced by the
Configuration Data page after approximately 5 seconds.
(c) Verify that the Configuration Data page Configuration Discrete Parity Status and Power
On Self Test results both show results of Pass. If the result is FAIL, further diagnostic
effort is required to determine if the failed indication is the result of a fault in the wiring, a
faulty ND, or both.
(d) Verify that the Configuration Data page displays the correct installation location (primary
or secondary).
(e) Remove power from the ND to terminate Test Mode. Re-apply power to the ND and start
the display in Mission Operational Mode.
(f)
Verify that the ND displays the Initialization page for approximately 5 seconds prior to
displaying the HSI Screen Format. If power has not been applied to the ADAHRS then the
HSI screen format will display the heading failure indication.
(g) Apply power to the Air Data Attitude Heading Reference System (ADAHRS) (i.e. - AHRS)
providing serial data to the ND.
(h) Apply power to the Primary Flight Display (PFD) (i.e. - EADI) providing serial data to/from
the ND.
(i)
Verify that the HSI Screen Format is displayed and the installation specific defaults as
shown in Chart 4 apply. If any of the failure flags are displayed refer to Chart 3.
(j)
Enable the Mission Operational Mode/Rev Mode menu by pressing the bezel mounted
'MNU' button. Verify that the menu is displayed correctly.
5D3
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
PRODUCE THE EXPECTED RESULTS, THAT COMPONENT MUST NOT BE
USED IN FLIGHT UNTIL THE PROBLEM IS CORRECTED.
34-20-00
Apr 15/07
PAGE 9
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Table of Contents
Troubleshooting
