What was found
AIRCRAFT IN BASE MAINTENANCE: MULTIPLE EMERGENCY LIGHTING WELS CONTROL UNITS HAVE FAILED. REPLACED WCU AND BATTERY IAW AMM 33-51-07, OPS CHECK IAW AMM 33-51-00-00C-320A.
- Difficulty date
- September 11, 2026
- Submitted
- September 15, 2026
- Operation
- Air carrier
- Aircraft
- N834AA
- Make and model
- Boeing 7879
- Aircraft serial
- 40653
- Aircraft time
- 32,043 hours, 3,794 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Controller
- Part number
- 100260103
- Condition
- Inoperative
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.