# SDR CALA2017081402636

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2017
- Submitted: August 14, 2017
- Operation: Air carrier
- Aircraft: [N16709](https://openairdocs.org/aircraft/N16709), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28779
- Aircraft time: 62,471 hours, 21,694 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sensor
- Part number: 90004212
- Part serial: 0758
- Condition: Faulty
- Location: Te Flaps
- Part time: 62,471 hours, 21,694 cycles
- Stage of operation: AP
- 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/CALA2017081402636

## Discrepancy

FLAP FAILED TO EXTEND LT & RT NEEDLE GAUGE SPLIT COMPLIED WITH QRH.  LANDED FLAPS UP.  EMERGENCY DECLARED.  ACP TS PROCEDURE FIM 27-51-00-810-826,  FOUND SKEW SENSOR 4 FAILED, WITH PARAMETERS READINGS OUT OF LIMITS, AFTER FSEU INTERROGATIONS. REPLACED FLAP SKEW SENSOR POS 4 IAW AMM 27-59-01-000-8 02 AND 27-59-01-400-802, OPS CHECKED GOOD IAW AMM 27-51-00-810-802.

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