NO
5
CHECK FOR 10V |5V DC AT
25 INSTALL CONNECTOR D196 ON PIN 4 (PIN 2, GND) OF CONNEC-ENGINE COWL ANTI-ICE VALVE, TOR D196. V4.
IS 10V |5 DC AVAILABLE? REPLACE ENGINE/WING ANTI-ICE CONTROL MODULE, P5-11
YES (AMM 30-11-41/401).
IF THE PROBLEM CONTINUES, EXAMINE ENGINE 1 (2) CIRCUITFROM PIN 4 OF CONNECTOR D196, TO PIN 12 OF CONNECTOR D462 (D648)(WDM 75-11-11,-12).
REPAIR THE PROBLEMS THATYOU FIND.
NO
6 PLACE ENG ANTI-ICE SWITCH26 INSTALL CONNECTOR D196 ONTO THE "ON" POSITION.ENGINE COWL ANTI-ICE VALVE,
CHECK FOR 28V DC AT PIN 1 V4. (PIN 2, GND) OF CONNECTOR REPLACE ENGINE/WING ANTI-D196. ICE CONTROL MODULE, P5-11
IS 28V DC AVAILABLE? (AMM 30-11-41/401). IF THE PROBLEM CONTINUES,
YES EXAMINE ENGINE 1 (2) CIRCUITFROM PIN 1 OF CONNECTOR D196, TO PIN 14 (13) OF CONNECTOR D462 (D648)(WDM 75-11-11,-12).
REPAIR THE PROBLEMS THAT YOU FIND.
YES
7 INSTALL CONNECTOR D196 ON
ENGINE COWL ANTI-ICE VALVE,
V4
CLOSE FAN COWLS AND CONFI-GURE BLEEDS AS FOLLOWS:
1.
APU BLEED "OFF"
2.
ENGINE BLEED "ON"
3.
APPLICABLE ENG ANTI-ICE CONTROL SWITCH "OFF"
4.
START APPLICABLE ENGINE (AMM 71-00-00/201).
DOES THE BLUE "COWL VALVE OPEN" LIGHT COME ON?
NO YES
8 PLACE APPLICABLE ENGINE
ANTI-ICE CONTROL SWITCH TO THE
"ON" POSITION.
DOES THE BLUE "COWL VALVE OPEN" LIGHT COME ON BRIGHT AND THEN GO DIM?
NO SEE SHEET 3
(BLOCK 9)
Blue COWL VALVE OPEN Light and Applicable Engine Anti-Ice Switch Are in Disagreement
Figure 102 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
FROM SHEET 2 (BLOCK 8)
Blue COWL VALVE OPEN Light and Applicable Engine Anti-Ice Switch Are in Disagreement
Figure 102 (Sheet 3)
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E84825
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737-300/400/500MAINTENANCE MANUAL
INLET COWL ANTI-ICING SYSTEM - ADJUSTMENT/TEST
______________________________________________
1. General_______
A. This subject contains two tasks. The first task is an operational test of the engine inlet cowl anti-icing system. It is necessary to operate a ground air source the APU or an engine for the operational test.
B. The second task is a system test of the engine inlet cowl anti-icing system. For the system test, it is necessary to open the thrust reverser and connect a jumper at the electrical connectors for the TAI valve, the TAI pressure switch, and the TAI overheat switch.
TASK 30-21-00-715-013
2. Inlet Cowl Anti-Ice Operational Test With Engine Power______________________________________________________
A. General
(1)
There are three alternative procedures to do the operational test of the engine inlet cowl anti-ice system. The first procedure uses the engines for pneumatic power the second procedure uses the APU, and the third procedure uses a ground air source. It is only necessary to do one of these procedures for this test.
___
(2)
If you do the Inlet Cowl Anti-Ice Operational Test with Engine Power, do not do the procedures: Inlet Cowl Anti-Ice Operational Test with APU Power or Ground Air Source (which follows).
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 36-05-00/201 Ground Air Source
(3)
AMM 49-11-00/201, APU Power Plant
(4)
AMM 71-00-00/201, Power Plant (Operating Procedures)
(5)
AMM 78-31-00/201, Thrust Reverser System
C. Access
(1)
Location Zone
101, 102 Control Cabin
200, Lower Half of the Fuselage
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