TM 55-1520-240-T
2-2.7 LH VIB ABSORBER CIRCUIT BREAKER WILL NOT STAY CLOSED (Continued)
2 - 2 .7
REMOVE ELEC PWR AND
DISCONNECT CONNECTOR
OPEN NO. 2 PDP. CHECK
139P4 FROM TEST BOX.
FOR SHORT BETWEEN CIR-
CLOSE LH VIB ABSORB
CUIT SIDE OF LH VIB AB-
CB 139CB1 DID CIRCUIT
SORB CB 139CB1 AND
BREAKER STAY CLOSED?
GROUND. IS SHORT PRE-
LOCATE SHORT ON WIRES
W552-229-22 OR W639-
359-20 BETWEEN CB
139CB1 AND CONNECTOR
139P4 PIN A. REPAIR OR
REPLACE WIRE AS RE-
QUIRED
REPLACE LH VIB ABSORB
CIRCUIT BREAKER.
REMOVE ELEC PWR AND
DISCONNECT TEST BOX
CONNECTOR 139P4. CHECK
FOR SHORT BETWEEN
PLUG 139P4 PIN D AND
GROUND, IS GROIJND PRE-
REMOVE COPILOT’S SEAT
AND ACCESS COVER
UNDER COPILOT’S SEAT
AND DISCONNECT VIB AB-
SORBER CONNECTOR
139P1. CHECK FOR SHORT
BETWEEN PLUG 139P1 PIN
B AND GROUND. IS SHORT
PRESENT?
REPLACE TEST BOX.
REPLACE LH DYNAMIC AB-
SORBER.
END OF TASK
Change 2
2-31
