What was found
BASE MAINTENANCE, L2 DOOR, EPSU (EMERGENCY POWER SUPPLY UNIT) BATTERY PACK M33099 FAILED FUNCTIONAL CHECK, PER WORKCARD 2312. REPLACED BATTERY PACK, L2 DOOR EPSU, PER AMM 33-51-06. OPERATIONAL CHECK PASSED.
- Difficulty date
- September 28, 2020
- Submitted
- September 30, 2020
- Operation
- Air carrier
- Aircraft
- N791AN
- Make and model
- Boeing 777223
- Aircraft serial
- 30254
- Aircraft time
- 78,471 hours, 10,046 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- Part number
- D71702001
- Part serial
- 129263
- Condition
- No Test
- 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.