Additional Ground Tests - Garmin GPS 500 Installation Manual

5.3

ADDITIONAL GROUND TESTS

5.3.1 Connector Engagement Test
1. Turn on the 500 Series unit, and turn on the avionics master switch (if applicable).
2. Place the 500 Series unit in the rack and engage the pawl mechanism.
3. Turn the Allen screw of the locking pawl slowly clockwise until the 500 Series unit just comes on. A
"T" handle makes the turns easy to count, but do not over-tighten.
4. Count the number of complete revolutions you can turn the Allen screw until it can not turn any more
(but take care not to over-tighten). Three turns is the minimum for proper installation. If fewer than
three turns are possible, the mounting rack should be moved aft such that the aircraft panel does not
obstruct the unit from engaging in the rack.
5.3.2 Verification of Self-test Data
Following normal power-up, the Data Base Page is displayed followed by the Instrument Panel Self-Test
Page. Pressing the ENT key once then displays the Instrument Panel Self-Test page (refer to Figure 5-4 on
page 5-5). During this time, many of the electrical outputs are activated so the installation, configuration,
and wiring may be verified. Before approving the Instrument Panel Self-test Page, verify that the
following parameters are displayed on equipment in the aircraft as listed below:
Electronic displays which monitor the 500 Series unit's ARINC 429 output may vary in
how and where annunciations are displayed. Generally, it is not required to verify every
data field with an ARINC 429 interface. Correct display of a subset of the data without
noting any discrepancies is typically adequate evidence of correct ARINC 429 operation.
Parameter
Course Deviation
Glideslope/Vert.
Deviation
Bearing to Waypoint
Desired Track
Selected Course
Distance to Go
Time to Go
Active Waypoint
Groundspeed
Present Position
Waypoint Alert
Phase of Flight
Message Alert
Leg/OBS Mode
GPS Integrity
Roll Steering (if
applicable)
500 SERIES INSTALLATION MANUAL
190-00181-02
NOTE
Self-test Value
Half-scale left deviation, TO indication, flag pulled
Half-scale up deviation, flag pulled
135º
149.5º
500 Series unit displays the OBS value (149.5º if interfaced to an
HSI with driven course pointer).
10.0 nautical miles
4 minutes
"GARMN"
150 knots
N 39º04.05', W 94º53.86'
Active
En Route
Active
Leg Mode
Reflects actual GPS integrity
Flight Director commands 0º bank (level flight) for 5 seconds;
commands increasing right bank at 1º/second for 5 seconds;
commands 5º right bank for 5 seconds; commands decreasing
right bank at 1º/second for 5 seconds, until command is 0º bank
again. This cycle repeats continuously.
Page 5-21
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