Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date
June 25, 2023
Submitted
June 27, 2023
Operation
Air carrier
Aircraft
N960WN
Make and model
Boeing 7377H4
Aircraft serial
36675
Aircraft time
38,108 hours, 23,248 cycles
Part
Battery Pack
Part number
UNKNOWN
Condition
Inoperative
Location
Zn 200 Fus Top
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY EXIT LIGHTS ASSOCIATED WITH BATTERY PACK M1673 ARE INOP. REPLACED EMERGENCY EXIT LIGHT BATTERY PACK M1673 IAW AMM 33-51-06-960-805. PERFORMED GOOD CONTINUITY CHECK ON CONNECTOR D11330 AND AISLE LAMPS ON BS 720, WL 274, LBL 30, & AISLE LIGHT BS 850 WL 274 RBL 30 . PERFORMED CONTINUITY CHECK OF CONNECTOR D11340 & FOUND PIN 1 SHORTED TO GROUND. WORK PERFORMED PER WPM 33-51-14. REPLACED F3 FUSE ON M1673 EMERGENCY BATTERY CHARGER. SECURED BS 790, RBL 30, & 896, LBL 28, AISLE LIGHT ASSEMBLIES & PERFORMED GOOD OPS TEST OF M1673'S CORRELLATED LIGHTS IAW AMM 33-51-00-710-801, AMM 33-51-06-960-804 & AMM 33-51-03-960-802, STEP 3.D.(1)(E)-(H). NO ADDITIONAL FAULTS OBSERVED.

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