# SDR USAA2013061700033

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2013
- Submitted: June 17, 2013
- Operation: Air carrier
- Aircraft: N442US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24841
- Aircraft time: 60,983 hours, 41,671 cycles
- System (JASC): [2781 · Leading Edge Slat Position Indicating System](https://openairdocs.org/jasc/2781)
- Part: Proximity Sensor
- Part number: 189929
- Condition: Faulty
- Location: Krueger Flap
- 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/USAA2013061700033

## Discrepancy

AFTER TAKEOFF, THE NR 4 L/E DEVICE GREEN LIGHT (GREEN OVERHEAD PANEL) REMAINED ILLUMINATED. IN ADDITION, THE L/E FLAP TRANSIT LIGHT (YELLOW) REMAINED ILLUMINATED. FLIGHT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT.  MX REPLACED NR 4 KRUEGER FLAP UP SENSOR AND DOWN SENSOR IAW AMM 27-88-11. OPS CHECK NORMAL.

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