# SDR DALA2021021600875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2021
- Submitted: February 16, 2021
- Operation: Air carrier
- Aircraft: [N540US](https://openairdocs.org/aircraft/N540US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26487
- Aircraft time: 73,381 hours, 27,716 cycles
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Pressure Switch
- Condition: Malfunctioned
- Location: Flap System
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021021600875

## Discrepancy

SHIP 5640 - THE "FLAP DISAGREE" EICAS MESSAGE DISPLAYED ON APPROACH WHEN THE FLAPS WERE SELECTED TO EXTEND. THE FLIGHT CREW PERFORMED A GO-AROUND, DECLARED AN EMERGENCY, AND USED THE ALTERNATE FLAPS FOR LANDING. CORRECTIVE ACTION: MAINTENANCE REPLACED THE FLAP/SLAT DEPRESSURIZATION MODULE PRESSURE SWITCH AND COMPLIED WITH THE NO GO ODI PROCEDURES. AIRCRAFT HAS RETURNED TO SERVICE. (LP #7574196)

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