# SDR CALA2024041801135

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2024
- Submitted: April 18, 2024
- Operation: Air carrier
- Aircraft: [N38417](https://openairdocs.org/aircraft/N38417), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 31665
- Aircraft time: 49,550 hours, 17,515 cycles
- System (JASC): [2781 · Leading Edge Slat Position Indicating System](https://openairdocs.org/jasc/2781)
- Part: Proximity Sensor
- Part number: 189929
- Condition: Failed
- Location: Te Flaps
- Stage of operation: CL
- 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/CALA2024041801135

## Discrepancy

LE FLAPS TRANSIT LIGHT AND NO 3 LEADING EDGE FLAP LIGHT REMAINED ON WHEN FLAPS RETRACTED.  UPON FURTHER REVIEW REQUEST MX TO REMOVE AND REPLACE THE LE FLAP #3 EXTEND SENSOR (S173) REF AMM 27-88-11. BITED FSEU IAW FIM 27-51 TASK 801 AND FOUND F3 PROX RETRACT. R/R FLAP 3 RETRACT PROX SENSOR(S172) IAW AMM 27-88-11. WIRES NEEDS TO BE SECURED WITH LACING AND NEEDS AN OPS CHECK. CARRIED BY ELB PREFORMED LAND VERIFY TEST REF AMM 22-11-00. AIRCRAFT FULL AUTOLAND NO FAULTS NOTED SECURED F3 PROX SWITCH WIRES. OPS CHECK GOOD REF AMM 27-88-11.

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