What was found
AIRCRAFT WAS GROUNDED: DOOR 3L INDICATED UNLOCKED BEFORE LANDING AROUND 6,000 FEET. MAINTENANCE REPLACED DOOR PROXIMITY DETECTOR SWITCH PER AMM 52-71-13 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.
- Difficulty date
- March 8, 2026
- Submitted
- March 9, 2026
- Operation
- Air carrier
- Aircraft
- N978UY
- Make and model
- Airbus A321231
- Aircraft serial
- 5422
- Aircraft time
- 40,660 hours, 16,731 cycles
- System (JASC)
- 5270 · Door Warning System
- Part
- Proximity Sensor
- Part number
- DHE1141
- Condition
- Faulty
- Location
- Zone 800
- Stage of operation
- DE
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.