What was found
AIRCRAFT WAS GROUNDED: OPERATIONAL TEST OF THE EMERGENCY LIGHTING SYSTEM SHOWED EMERGENCY POWER SUPPLY UNIT 10WL FAULTED. REPLACED EMERGENCY POWER SUPPLY UNIT 10WL AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.
- Difficulty date
- November 7, 2021
- Submitted
- November 9, 2021
- Operation
- Air carrier
- Aircraft
- N402AN
- Make and model
- Airbus A321253NX
- Aircraft serial
- 8750
- Aircraft time
- 6,773 hours, 1,887 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- 32146210
- Part serial
- 146550
- Condition
- Faulty
- Location
- Zone 200 - Fuse
- Part time
- 22,302 hours, 8,383 cycles
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L, J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.