What was found
POWER SUPPLY BATTERY PACK CAPACITY CHECK PROCEDURE. ALL LIGHTS ASSOCIATED WITH EMERGENCY POWER PACK M33405 ARE INOPERATIVE. REPLACED BATTERY PACK AT POWER SUPPLY M33405, ALL ASSOCIATED LIGHTS CK OK.
- Difficulty date
- September 26, 2026
- Submitted
- September 28, 2026
- Operation
- Air carrier
- Aircraft
- N773UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26929
- Aircraft time
- 111,642 hours, 21,342 cycles
- Engine
- Pwa PW4077
- 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.