What was found
FOUND EMERGENCY LIGHT BATTERY (M5933) FUNCTION FAIL. IAW AMM 33-51-04-902-001-001 REV 115. R & R EMERGENCY LIGHT BATTERY POWER SUPPLY (M5933) & PERFORMED POWER SUPPLY INSTALLATION TEST, TEST GOOD.
- Difficulty date
- February 5, 2026
- Submitted
- February 5, 2026
- Operation
- Air carrier
- Aircraft
- N481MC
- Make and model
- Boeing 747443
- Aircraft serial
- 32339
- Aircraft time
- 91,419 hours, 11,972 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- BP573
- Part serial
- 46J84
- 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.