What was found
AIRCRAFT IN BASE MAINTENANCE - EMERGENCY LIGHT TEST FAILED, L1 DOOR. REMOVED AND REPLACED BATTERY PACK, EPSU (EMERGENCY POWER SUPPLY UNIT) M33424, L1 DOOR, PER AMM 33-51-06, OPERATIONAL CHECK GOOD.
- Difficulty date
- September 3, 2020
- Submitted
- September 8, 2020
- Operation
- Air carrier
- Aircraft
- N778AN
- Make and model
- Boeing 777223
- Aircraft serial
- 29587
- Aircraft time
- 84,587 hours, 10,287 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- Part number
- ADD71701100
- Part serial
- 215355
- Condition
- Discharged
- Location
- Emergency Lights
- 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.