What was found
U/D EMER LT POWER SUPPLY (M516B) CAPACITY TEST FAIL(<P>U/D EMER LT POWER SUPPLY BATTERY REPLACED AND OPERATIONAL TEST NORMAL IAW AMM 33-51-00, REV 37 15 NOV 2021.</P>)
- Difficulty date
- February 23, 2022
- Submitted
- February 25, 2022
- Operation
- Air carrier
- Aircraft
- N850GT
- Make and model
- Boeing 74787UF
- Aircraft serial
- 37570
- Aircraft time
- 39,118 hours, 7,610 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 20131A
- Part serial
- 115047
- Condition
- Failed
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.