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S 845-092
(16) On the IRS control panel, set the left and right IRS MODE SELECTORS to
OFF.
S 864-015
(17) Remove electrical power if it is not necessary (AMM 24-22-00/201)
B757-200Aircraft Maintenan ce Specialized Training - 47 -
For Training Purpose Only Printed:May 2005
205 GROUND TEST PROCEDURE for a
206 B757-200 SERIES HONEYWELL MK V
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS)
FAA PROJECT NUMBER ST6998AT-T
B757-200Aircraft Recurr ent Training Manual - 48 -
For Training Purpose Only Printed:May 2005
REVISION HISTORY
Revision
Level
Description
Pages
Affected
Date
I/R Initial Release All 11-18-03
B757-200 Aircraft Recurrent Training Manual - 49 -
1.0 INTRODUCTION
This document provides a procedure for checkout of aircraft installations of the
Honeywell Enhanced Ground Proximity/Windshear Warning System (EGPWS).
2.0 EFFECTIVITY
The procedures defined herein are effective for the EGPWS installation on the Boeing 757
using aircraft type 224.
3.0 REFERENCE DOCUMENTS
965-0976-603 Product Specification for the Enhanced Ground Proximity Warning System
(EGPWS)
993-0976-401 Interface Control Document (Lcd) for the MK V Enhanced Ground Proximity
Warning System (EGPWS)
060-4199-180 Line Maintenance Manual, MK V, MK VI, MK VII, MK VIII Enhanced Ground
Proximity Warning System
See EMTQ-015M-2 Ground Proximity and Windshear wiring diagrams for the aircraft being
tested
4.0 REQUIRED TEST EQUIPMENT
Multimeter
Other Tools and Equipment as Required
Optional: EGPWS Break-out Box
5.0 AIRCRAFT/EQUIPMENT IDENTIFICATION
Record the following information:
Aircraft Registration/Tail Number: _______________________________________
EGPWS Part Number/Mod Status: _______________________________________
EGPWS Serial Number: _______________________________________
For Training Purpose Only Printed:May 2005
B757-200 Aircraft Recurrent Training Manual - 50 -
6.0
TESTING PROCEDURES
The first step is to verify the power and ground inputs are correct. Then the test will utilize
the Built-In-Test (BIT) capabilities of the EGPWS to verify the ARINC 429 inputs, the analog input
discretes and the program pins.
6.1 Passing Criteria
All steps with the word VERIFY must pass in order to complete this test.
6.2 System Self Test
The following tests verify the installation through the BIT capabilities of the EGPWC.
A high level of confidence in the EGPWS installation can be achieved by initiating the EGPWS self
test. The EGPWS System Self Test is divided into six levels. These are:
Level 1 Long Self Test (includes Go / No Go Test).
Level 2 Current Faults.
Level 3 EGPWS Configuration.
Level 4 Fault History.
Level 5 Warning History.
Level 6 Discrete Input Test.
6.2.1 Self Test Initiation
Self Test is initiated by pressing the GND PROX test switch for less than 2 seconds.
NOTE: The Self Test Aural volume is 6 dB lower than the Warning Aural volume.
NOTE: During normal maintenance operation, the Self Test may be initiated via the SELF TEST
switch on the front of the EGPWC. However, for this test procedure only the GND PROX test
switch in the cockpit may be used as the GPWS test switch. Do not use the SELF-TEST switch
on the front of the EGPWC for this test procedure.
6.2.2 Self Test Short and Long Cancel
Short Cancel is accomplished by pressing and holding the GND PROX test switch for less than 2
seconds.
Long Cancel is accomplished by pressing and holding the GND PROX test switch for between 2 and
8 seconds.
6.2.3 Internal Global Positioning System (GPS) Card for Production Installations
NOTE: Aircraft must be in an area that can receive valid GPS position data (e.g. outside of
hangar or within hangar with GPS repeater).
1. Taxi or tow the aircraft to an unobstructed ramp position.
For Training Purpose Only Printed:May 2005
B757-200 Aircraft Recurrent Training Manual - 51 -
2. Push in EGPWS circuit breaker for system activation.
3. For an initial position fix of the EGPWS, allow up to 20 minutes for system to come
on line and to acquire satellites.
4. VERIFY the TERRAIN INOP light is not illuminated.
PASS FAIL
5. End of Internal GPS Test for Production Installations.
6.2.4 Self Test Level I — Long Self Test
Test Procedure:
1. Install the EGPWS into the rack or connect it to the Break-out Box and turn power on.
2. Ensure that all systems supplying data to the EGPWC are powered and operating correctly,
e.g.:
ADC #1 or #2 LRRA #1, #2, or #3
IRS #1or #2 FMC #1 or #2
ILS #1 or #2 DSWC #1 or #2
EFIS Control Panels #1 or #2 EFIS Displays #1 or #2
　
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