# SDR SWAA2019051332548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2019
- Submitted: May 13, 2019
- Operation: Air carrier
- Aircraft: [N7750A](https://openairdocs.org/aircraft/N7750A), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36716
- Aircraft time: 37,849 hours, 18,672 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sensor
- Part number: 0270331
- Part serial: 3687
- Condition: Faulty
- Location: Lt Wing
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2019051332548

## Discrepancy

AIR TURNBACK/DECLARED EMERGENCY, ON DEPARTURE, FLAP RETRACTION RIGHT TRAILING SHOWED EP ASYMMETRY WITH CONTROL INPUT.  LEADING EDGE DEVICES SHOWED NO ASYMMETRY RIGHT NEEDLE BETWEEN 1 AND 2. LEFT NEEDLE SHOWED SELECTED POSITION 1 (NORMAL) ON TAXI TO GATE NEEDLES SHOWED NORMAL.  PSEU ILLUMINATED OR GROUND.  R&R NR 4 SKEW SENSOR PER MM.

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