S 865-042

 (7)  
Close the AIR DATA COMPTR-1 circuit breaker.

 (a)  Make sure that the indicator lights go off.
 S 865-043
 (8)  Open the RADIO ALTM-1 circuit breaker.
 (a)  Make sure that the INOP indicator light comes on.
 S 745-044
 (9)  
Push the SYS TEST switch for 5 seconds.

 (a)  Make sure that the INOP indicator light stays on.

 (10)
 Release the SYS TEST switch.

 S 745-045
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK II GPWC ú

 34-42-00
 ú ú 02 Page 503 ú Nov 15/92

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 865-046
 (11) Close the RADIO ALTM-1 circuit breaker.
 (a)  Make sure that the indicator light goes off.
 TASK 34-42-00-735-051
 3.  Ground Proximity Warning System - System Test_____________________________________________
 A. Standard Tools and Equipment
 (1)  
Pitot-static test set, probe adapter and gages

 (2)  
LRRA Altitude Simulator (Collins Radio Co, 980N-1)

 (3)  
Signal Generator, IFR NAV 4O1L (VOR/ILS test set)

 (4)  
Stop watch

 B. References
 (1)  
AMM 34-11-00/501, Pitot-Static System

 (2)  
AMM 34-11-01/501, Pitot-Static System

 (3)  
AMM 34-12-00/501, Air Data System

 (4)  
AMM 34-12-01/501, Air Data System

 C. Prepare for the Test
 S 865-005
 (1)  Do the steps that follow for the system test:
 (a)  
AIRPLANES WITHOUT EFIS; Set up the pitot-static test set and adapter to the captain's pitot-static system (AMM 34-11-00/501), so you can get predetermined altitude rates from the No. 1 CADC (AMM 34-12-00/501).

 (b)  
AIRPLANES WITH EFIS; Set up the pitot-static test set and adapter to the captain's pitot-static system (AMM 34-11-01/501), so you can get predetermined altitude rates from the No. 1 CADC (AMM 34-12-01/501).

 (c)  
Set up the LRRA altitude simulator such that the radio altitude from No. 1 LRRA can be set and changed.

 (d)  
Set up the signal generator such that glide slope deviation signals can be set and changed.

 S 865-053
 CAUTION:_______ALL LANDING GEAR GROUND LOCKS MUST BE INSTALLED. THERE MUST BE NO PRESSURE ON ANY HYDRAULIC SYSTEM. NO ATTEMPT SHALL BE MADE TO CHANGE THE FLAG IN THE LANDING GEAR HANDLE AND NO TRY MUST BE MADE TO MOVE THE HANDLE INTO THE UP POSITION.
 (2)  Make sure that the movement of the landing gear selector lever will not cause a movement of the landing gear.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK II GPWC ú

 34-42-00

 ú ú 03 Page 504 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 865-054
 CAUTION: MAKE SURE THAT THE GROUND EQUIPMENT IS OUT OF FLAP TRAVEL.
_______ MAKE SURE THAT ALL PERSONNEL SAFETY PRECAUTIONS AND WARNINGS ARE IN EFFECT.
 (3)  Make sure that the trailing edge flaps and drive system are
 correctly installed, adjusted and prepared for operation.

 D. Do a Test of the System
 S 715-057
 (1)  
Do the GPWS - Operational Test.

 S 735-056

 (2)  
Do a test of the Take Off Descent Warning as follows:

 (a)  
Use the radio altimeter test set to make a radio altitude of 600 feet and then decrease to 400 feet.

 (b)  
Pull the landing gear override trigger and set the landing gear lever to OFF position.

 (c)  
Using the pitot static test set, set an altitude of 600 feet.

 (d)  
Make a barometric sink rate of 500 feet per minute. Make sure that the PULL UP indicators and aural warning consists of DON'T SINK come on between 4 to 9 seconds from start of sink rate simulation.
　
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