What was found
AIRCRAFT IN BASE MAINTENANCE: DOOR 4 RIGHT HAND WELS CONTROL UNIT FAIL TEST. REMOVE AND REPLACED WELS EMERGENCY LIGHTING SYSTEM CONTROL UNIT BATTERY. PER B787 AMM DMC-B787-A-33-51-07-02B-520A-A AND 33-51-07-02B-720A-A.
- Difficulty date
- March 25, 2024
- Submitted
- March 28, 2024
- Operation
- Air carrier
- Aircraft
- N804AN
- Make and model
- Boeing 7878
- Aircraft serial
- 40622
- Aircraft time
- 32,237 hours, 4,306 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 100260201
- Part serial
- ST20109170
- Condition
- No Test
- Location
- Emergency Lights
- 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.