What was found
EMERGENCY LIGHT AT DOOR 4R DOES NOT LIGHT UP DURING OPS CHECK MAINT MSG:33-11408. CLASS 08-DOR 4 RH PIME WELLS CONTROL UNIT BATTERY POWER IS FAILED. EMERGENCY WELLS BATTERY REPLACED IAW AMM 33-51-07-02A-520/ 720A-A.TEST SATISFACTORY.
- Difficulty date
- May 20, 2026
- Submitted
- May 20, 2026
- Operation
- Air carrier
- Aircraft
- N24973
- Make and model
- Boeing 7879
- Aircraft serial
- 40941
- Aircraft time
- 39,797 hours, 3,761 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- AD100260201
- Part serial
- 5258
- Condition
- Failed
- 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.