What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY LIGHTS POWER SUPPLY M33404 FAILED DURING TEST. REPLACED POWER SUPPLY M33404 BATTERY PACK PER AMM 33-51-06. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.
- Difficulty date
- March 29, 2023
- Submitted
- March 30, 2023
- Operation
- Air carrier
- Aircraft
- N726AN
- Make and model
- Boeing 777323ER
- Aircraft serial
- 31550
- Aircraft time
- 37,778 hours, 4,394 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Unknown
- Condition
- Unknown
- Location
- Unknown
- 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.