What was found
EMERGENCY LIGHT BATTERY PACK M33401,ABOVE DR 4R AFT, FAILED DEEP CYCLE CAPACITY TEST. EMER LIGHT BATTERY PACK (M33401) REPLACED AS PER AMM33-51-06. INSTALLATION TEST PERFORMED AS PER AMM33-51-06 SATISFACTORY.
- Difficulty date
- April 17, 2026
- Submitted
- April 20, 2026
- Operation
- Air carrier
- Aircraft
- N2142U
- Make and model
- Boeing 777300ER
- Aircraft serial
- 63722
- Aircraft time
- 38,256 hours, 4,230 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- Part number
- ADD71701100
- Condition
- No Test
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.