(b)
Shut down inertial reference system (Ref 34-28-00).
(c)
Remove external electrical power if no longer required (Ref 24-22-00, Maintenance Practices - Apply Power).
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34-41-01
ALL ú ú 02B Page 18 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WEATHER RADAR SYSTEM - ADJUSTMENT/TEST
______________________________________
1. General_______
A. This subject has three tasks. The tasks are: an operational test, a system test and a system shutdown procedure.
B. The operational test uses the self-test circuits to make sure the weather radar system is serviceable. The system test makes sure all functions of the weather radar operate correctly. The system shutdown procedure is used to set the weather radar system and other related airplane equipment back to their usual condition.
C. The operational test must be done at the start of the system test. The system test is done as a maintenance function and can be used to find failures in the system.
(1) The weather radar indicator is referred to as the WXR indicator.
TASK 34-41-01-715-037
2. Operational Test - Weather Radar System_______________________________________
A. General
(1) The operational test has these parts:
(a)
The prepare for a weather radar system operational test.
(b)
The weather radar system self-test.
(c)
The test of the controls on the WXR indicator.
B. References
(1)
AMM 21-58-00/501, Equipment Cooling
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 34-28-00/201, Inertial Reference System
C. Access
(1) Location Zones
101 Control Cabin, Left
102 Control Cabon, Right
202 Lower Nose Compartment
D. Procedure
S 865-038
(1) Prepare to do the operational test.
(a) Supply electrical power (AMM 24-22-00/201).
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34-41-01
ú ú 03 Page 501 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WARNING: DO NOT OPERATE THE WEATHER RADAR WHILE FUEL IS ADDED OR
_______ REMOVED FROM THE AIRPLANE. DO NOT TRANSMIT RF ENERGY WHILE FUEL IS ADDED OR REMOVED IN AREA 200 FEET OR LESS OF THE ANTENNA. THIS CAN CAUSE AN EXPLOSION.
DO NOT OPERATE THE WEATHER RADAR WHILE THE AIRPLANE IS IN A HANGAR OR OTHER ENCLOSURE. MAKE SURE NO PERSONS ARE IN THE AREA 15 FEET OR LESS FROM THE ANTENNA WHEN IT TRANSMITS RF ENERGY. RF ENERGY CAN CAUSE INJURY TO PERSONS.
CAUTION: WHEN AN LRU FAILURE MESSAGE SHOWS, STOP THE WEATHER RADAR
_______ SYSTEM TEST. IF YOU DO NOT STOP THE WEATHER RADAR, THE RESULT WILL BE DAMAGE TO THE DEFECTIVE LRU OR OTHER SYSTEM COMPONENTS.
(b)
Supply equipment cooling (AMM 21-58-00/501).
(c)
Make sure these circuit breakers are closed:
1) P6 Load Control Center - Right
a) WEATHER RADAR AC
b) WEATHER RADAR DC
(d)
Align the right inertial reference system in the NAV mode (AMM 34-28-00/201). 1) Make sure the ADI ATT flag is not in view.
(e)
Put these controls and switches on the WXR indicator in the positions shown: 1) STBY - On (pushed in)
NOTE: Let 1 minute pass for the system to become warm.
____
2) AZIM - Off
3) SEC SCAN - Off
4) FRZ - Off
5) TGT ALRT - Off
6) GAIN - PRE-SET
7) STAB - OFF
8) TILT - 0 Degree
9) INT - Middle poaition
10) RANGE - TEST
S 715-039
(2) Do the weather radar self-test (Fig. 501).
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