# SDR SWAA2022050904878

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2022
- Submitted: May 9, 2022
- Operation: Air carrier
- Aircraft: N770SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 30589
- Aircraft time: 70,184 hours, 41,576 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sensor
- Condition: Popped
- Location: L/H Flap Skew
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022050904878

## Discrepancy

FLAPS DID NOT EXTEND WHEN FLAPS 5 SELECTED. ALTERNATED ALTERNATE FLAP EXTENSION. ONLY RH SIDE FLAPS MOVED. LEFT STAYED UP. PERFORMED A NO FLAP LAND. UNEVENTFUL LANDING PSEU ILLUMINATED AFTER LANDING. / [01] BITE CHECKED FSEU FOUND FAULT MSG #27-53279 & LEFT T/E FLAP POS/SKEW SENSOR CIRCUIT BREAKER POPPED; WOULD NOT RESET; FLAPS WOULD NOT EXTEND WITH HYDRAULICS OR ELECTRIC. MANUALLY EXTENDED FLAPS; FOUND LH #3 FLAP SKEW SENSOR CAUSING C.B. TO POP. R&R?ED SKEW SENSOR PER AMM 27-59-01; FLAPS OPS CHECK NORMAL. ALSO CLEANED & INSPECTED CANNON PLUG D40024J ON LEFT WING DISCONNECT BRACKET; NO DESCREPANCIES NOTED ON THAT CANNON PLUG. C.B. RESET; FLAP SKEW DETECTION SYSTEM FUNCTIONAL TEST NORMAL IAW AMM 27-59-00.

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