# SDR CALA2026063017477

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2026
- Submitted: June 30, 2026
- Operation: Air carrier
- Aircraft: [N39475](https://openairdocs.org/aircraft/N39475), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 37100
- Aircraft time: 40,203 hours, 14,684 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sensor
- Part number: 90004531
- Part serial: 1669
- Condition: Faulted
- Location: Flap Sys
- Part time: 11,985 hours, 4,726 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026063017477

## Discrepancy

ON APPROACH FLAP  ASSYMETRY LESS THAN 1  DEGREE. FULL LEADING  E DGE SLATS UPON TROUBLESHOOTING FOUND MAINTENANCE MESSAGE 27-52259 ON FSCU FOR TE FLAP SENSOR LEFT I REMOVED AND REPLACED LEFT FLAP POSITION SENSOR IAW AMM TASK 27-58-01-400-801 OPS CHECK GOOD.

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