26-18-00
OVERHEAT ACCESSORY UNIT ú ú 02 Page 203 ú Nov 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 862-026
(4)
Push and hold the MEM READ switch.
S 862-027
(5)
Release the LOC TEST switch.
S 862-028
(6)
Release the MEM READ switch.
(a) The display will show code 96 for 5 seconds.
S 862-029
(7) Push the MEM CLEAR switch while the display shows code 96.
NOTE: The display will show the first alarm code.
____
S 862-030
(8) Push the MEM CLEAR switch to clear the first alarm code.
NOTE: The LED display will go out.
____
S 862-031
(9)
Push the MEM READ switch until the display shows the subsequent code.
S 862-032
(10)
Do these steps (8) and (9) until the display shows code 97.
S 862-033
(11)
Push the MEM READ or the MEM CLEAR switch until the display shows no codes.
I. Put the Airplane Back to Its Usual Configuration
S 862-034
(1) Remove electrical power, if it is not necessary (AMM 24-22-00/201).
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26-18-00
OVERHEAT ACCESSORY UNIT ú ú 02 Page 204 ú Nov 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1.
ú ú ú ú
2.
A
737-300/400/500MAINTENANCE MANUAL
WING AND LOWER AFT BODY OVERHEAT DETECTION SYSTEM - ADJUSTMENT/TEST
___________________________________________________________________
General
_______
A. There is one task in this section:
(1) Test the Wing and Lower Aft Body Overheat Detection System
B. This procedure does a test of the lights, the components, and the wires that are only a part of the wing and lower aft body overheat detectionsystem.
C. A test of the other lights, the components, and the wires that arespecific to the wheel well overheat detection system is done inAMM 26-17-00/501.
TASK 26-18-00-705-001Wing and Lower Aft Body Overheat Detection System Operational Test
__________________________________________________________________
A. References
(1) AMM 24-22-00/201, Manual Control
B. Access
(1) Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
C. Prepare for the Test
S 865-002
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-003
(2)
Make sure these circuit breakers are closed:
(a) P6 Load Control Center - Right 1) FIRE PROTECTION DETECTION OVHT WHL WELL WNG BDY 2) FIRE PROTECTION DETECTION MASTER WARN & CONTROL 3) AIR CONDITIONING OVERHEAT 4) MASTER CAUTION ANNUNCIATOR NO 1 5) MASTER CAUTION ANNUNCIATOR BAT 6) INDICATOR MASTER DIM BUS (nine circuit breakers) 7) DIM & TEST
D. Do the test
S 715-015
(1) Do the test of the wing and lower aft body overheat detection system operation.
(a) Push and hold the OVHT TEST switch on the (P5-10) air conditioning module.
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A 737-300/400/500MAINTENANCE MANUAL
(b) Make sure that these lights come on:
NOTE: Hold the OVHT TEST switch for 4-5 seconds to make
____ sure that the applicable indications come on.
1) The two WING BODY OVERHEAT lights on the P5-10. 2) The two MASTER CAUTION lights on the lightshield (P7). 3) The AIR COND annunicator light on the lightshield (P7).
(c)
Move the LIGHTS switch on the pilots' center panel (P2) to the DIM position (while the OVHT TEST switch is held).
(d)
Make sure that the intensity of the lights is dim.
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