# SDR UIEA2026021620048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2026
- Submitted: February 16, 2026
- Operation: Air carrier
- Aircraft: [N489MC](https://openairdocs.org/aircraft/N489MC), registered now
- Make and model: Boeing 747412F
- Aircraft serial: 26553
- Aircraft time: 120,938 hours, 21,077 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Sensor
- Part number: 834503AEC
- Condition: Faulted
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026021620048

## Discrepancy

GEAR TILT STATUS MESSAGE.  FOUND MX MSG 32713 & 32673. FOLLOWED FIM 32-61 TASK 883 & TASK 863.  REPLACED WIRE W1174-225/226 AND WIRE 1174-327 /228 IAW WDM 32-61-16 & 32-61-25. REMOVED AND REPLACED PRIMARY & ALTERNATE TRUCK TILT PROX SENSORS IAW AMM 32-61-12. PERFORMED OPS CHECKED IAW AMM 32-61-12, OPS CHECKED GOOD.

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