Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date
June 24, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N962WN
Make and model
Boeing 7377H4
Aircraft serial
36963
Aircraft time
38,452 hours, 23,554 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

AFT EMERGENCY LIGHTS ASSOCIATED WITH M1673 INOP<[01] DURING TROUBLESHOOTING IT FOUND BROKEN GROUND BLOCK (GD03948). OPEN GROUND 1 AND 7 FROM D10746 CONNECTOR CONTINUITY CHECK PERFOMED PER WDM 33-51-11.<BR><BR>TOOL USED:<BR>MULTIMETER ID: ATS1511 SN: UNK DD:05/2024.;[02] CERTIFYING ACTION ITEM 1.;[03] VERIFIED CORRECTIVE ACTION #1.;[04] REMOVE CONTACTS AND REMOVED GROUND BLOCK (GD03948) THEN REINSERTED CONTACTS INTO THE NEW (GD03948) GROUND BLOCK IAW SWPM 20-20-14;[05] VERIFIED ACTION ITEM 4.;[06] UPDATED STEP 1 TO REFLECT OPS CHECK OF BATTERY PACK M1673 WILL BE COMPLETED ON TASK CARD TTG8Q00LV1PK.;[07] GROUND BLOCK GD03948 WAS REMOVED AND REPLACED ON FAULT TTG8Q00LV1PK.;[08] VERIFIED CORRECTIVE ACTION #4; #6; #7.<BR>VERIFIED COMPLETE STEP 1.

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