What was found
AIRCRAFT WAS GROUNDED: 4L DOOR EMERGENCY POWER ASSIST SYSTEM GREEN TEST LIGHT DOES NOT COME ON WHEN EMERGENCY POWER ASSIST SYSTEM IS ARMED. REMOVED AND REPLACED 2 EA EMERGENCY POWER ASSIST SYSTEM BACKUP BATTERY, PER AMM 52-11-20.
- Difficulty date
- September 10, 2020
- Submitted
- September 14, 2020
- Operation
- Air carrier
- Aircraft
- N778AN
- Make and model
- Boeing 777223
- Aircraft serial
- 29587
- Aircraft time
- 84,587 hours, 10,287 cycles
- System (JASC)
- 2560 · Emergency Equipment
- Part
- Battery
- Part number
- MN1604
- Condition
- Failed
- Location
- Door Assist
- 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.