# SDR CALA2026092919963

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2026
- Submitted: September 29, 2026
- Operation: Air carrier
- Aircraft: [N37473](https://openairdocs.org/aircraft/N37473), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67749
- Aircraft time: 304 hours, 110 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Proximity Sensor
- Part number: 8020702
- Condition: Faulted
- Location: Flap Sys
- Stage of operation: CR
- 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/CALA2026092919963

## Discrepancy

INTERMITTENT LE FLAP EXT LIGHT AND OVHD FLAP 1 FULL XTND INDICATOR, SPEED CMD DROPS TO .63.   ON ARRIVAL FSEU BITE FAULTED F1 PROX EXTEND SWITCH, MSG 27-81217. ON GND, RAN FLAPS A COUPLE OF TIMES, FULL DOWN & UP.  ALL NORMAL.  REMOVED AND REPLACED LE FLAP 1, EXTEND SENSOR S169, ALL TARGETS CHECKED GOOD IAW AMM 27-88-11-400-802,  27-88-11-700-801.

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