SDR SWAA2021092722826

Service difficulty report · Battery Pack · Boeing 737

Difficulty date: September 24, 2021
Submitted: April 29, 2022
Operation: Air carrier
Aircraft: N208WN
Make and model: Boeing 737
Aircraft serial: 29856
Aircraft time: 52,294 hours, 30,932 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Condition: Failed
Location: Cabin
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

SUPPLEMENTAL INFORMATION: BATTERY PACK M1670(STA 727C+13; WL 212; LBL 68) FAILS CAPACITY TEST. / [01] REMOVED AND REPLACED BATTERY PACK M1670 (STA 727C+13 WL 212 LBL 68); PERFORMED GOOD INSTALLATION TEST AS PER AMM TASK 33-51-06-960-805. RELAMPEP AISLE LIGHT (STA 560 WL 274 BL 30) AND PERFORMED GOOD TEST OF THE NEW LAMP AS PER AMM TASK 33-51-03-960-801.; [02] VERIFIED CORRECTIVE ACTION STEP 1.