TM 55-1520-240-T
4-5.6 NO. 1 ENGINE FUEL CONTROL POINTER NOT AT GROUND BAND (Continued)
4-5.6
DID FUEL CONTROL POINTER
MOVE AWAY FROM STOP?
YES
IS ENGINE NO. 1 COND
CONT CIRCUIT BREAKER
CLOSED?
DISCONNECT NO 1 GAS PRO-
DUCER CONTROL BOX PLUG
102P2. CHECK FOR 28VDC AT
PIN T (+). IS 28VDC VOLTAGE
PRESENT?
CHECK FOR GROUND ON PLUG
102P2 PINS N AND P. IS
GROUND PRESENT ON BOTH
PINS?
LOCATE OPEN IN WIRE W591-
GD062A20N AND W591-
GD062B20N BETWEEN PLUG
102P2 AND FUSELAGE
GROUND. REPAIR OR REPLACE
WIRE AS REQUIRED.
REFER TO TROUBLE SYMPTOM
TASK 4-5.4.
LOCATE OPEN IN WIRES W550-
181-22, W645-321-22, OR
W591-37-22 BETWEEN PLUG
102P2 AND ENGINE NO. 1
COND CONT CB102CB1. RE-
PAIR OR REPLACE WIRE AS RE-
QUIRED.
CONNECT NO. 2 CONTROL BOX
TO NO. 1 ENGINE ACTUATOR
USING TEST HARNESS SET
(T 115). POSITION NO. 2 CONDl-
No
TION LEVER TO GROUND. DID
NO. 1 ENG ACTUATOR GO TO
GROUND BAND?
DISCONNECT HARNESS. CON-
NECT NO. 2 GAS PRODUCER
CONTROL BOX TO NO. 1 SYS-
TEM USING TEST HARNESS
SET (T115) POSITION NO. 1
CONDITION LEVER AT
GROUND. DID NO 1 ACTUA-
TOR GO TO GROUND BAND?
NO
DISCONNECT HARNESS AND
CONNECT PLUGS TO CONTROL
BOXES. CONNECT NO. 2 EN-
GINE CONDITION CONTROL
QUADRANT TO NO. 1 SYSTEM
USING TEST HARNESS SET
(T115) POSITION NO. 2 CONDl-
TION LEVER AT GROUND DID
NO 1 ACTUATOR GO TO
GROUND BAND?
DISCONNECT HARNESS. DIS-
CONNECT PLUG 102P2 FROM
NO 1 CONTROL BOX AND
PLUG 102P5 FROM QUAD-
RANT CHECK FOR CONTINUITY
BETWEEN FOLLOWING PINS
PLUG
PLUG
102P5
102P2
PIN
PIN
IS CONTINUITY PRESENT ON
ALL PINS?
LOCATE OPEN IN WIRE W559-
326-22 RED, W559-327-22
BLU, W645-322-22 RED,
W645-323-22 BLU, W591-39-
22 RED, W591-40-22 BLU,
W559-331-22 RED, W559-332-
22 BLU, W645-327-22 RED,
W645-328-22 BLU. W591-44-
22 RED OR W59145-ZZBLU
BETWEEN PLUGS 102P2 AND
102P5 REPAIR OR REPLACE
WIRE AS REQUIRED.
REPLACE NO 1 CONTROL BOX
GAS PRODUCER
REPLACE ENGINE CONDITION
CONTROL QUADRANT
LOCATE OPEN IN WIRE W559-
328-22 RED, W559-329-22
BLU, W645-324-22 RED,
W645-325-22 BLU, W591-41-
22 RED OR W591-42-22 BLU
REPAIR OR REPLACE WIRE AS
REQUIRED.
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Change 5
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