Service difficulty report · Battery · Boeing 7377H4

Difficulty date
November 19, 2021
Submitted
November 23, 2021
Operation
Air carrier
Aircraft
N780SW
Make and model
Boeing 7377H4
Aircraft serial
27885
Aircraft time
68,861 hours, 40,837 cycles
Part
Battery
Condition
Failed
Location
Cabin
Stage of operation
UK
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

M1674 BATTERY PACK FAILS CAPACITY TEST ; / [01] REMOVED AND REPLACED M1674 BATTERY PACK PER AMM 33-51-06-960-805 STEP 4.A. THROUGH 4.D.(6)(A); [02] REMOVED AND REPLACED M1674 POWER SUPPLY AS PER AMM. TASK 33-51-06-960-806 5.E.(1-4); [03] M1674 REQUIRES CHARGING TIME OF 180 MINUTES. POWER ON AND CHARGING START AT 13:15 HRS AS PER AMM. 33-51-06-960-805 D.6.B.2; [04] VERIFIED CORRECTIVE ACTION ENTRIES 2. AND 3.; [05] VERIFIED INSTALLATION OF M1674 POWER SUPPLY PER AMM 33-51-06-960-806 AND REPLACED M1674 BATTERY AND; CHARGED BATTERIES FOR 180 MINUTES; AND PERFORMED SATISFACTORY INSTALLATION TEST PER AMM 33-51-06-960-805; NO DEFECTS NOTED.; [06] VERIFIED CORRECTIVE ACTION ITEM 5.

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