What was found
EMERGENCY LIGHTS OPERATIONAL TEST, WITH THE TEST SWITCHES PROCEDURE. PACK BATTERY EMERGENCY POWER M33407, M33408 AND M33409 INOP. EMERGENCY POWER BATTERY PACKS M33407, M33408 AND M33409 REPLACED IAW AMM 33-51-06-960-802.
- Difficulty date
- August 13, 2026
- Submitted
- August 14, 2026
- Operation
- Air carrier
- Aircraft
- N217UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30550
- Aircraft time
- 99,393 hours, 11,780 cycles
- Engine
- Pwa PW4090
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- Part number
- ADD71701100
- Condition
- No Test
- Location
- M33407, M33408,
- 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.