# SDR FDEA202305050813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2023
- Submitted: May 5, 2023
- Operation: Air carrier
- Aircraft: [N778FD](https://openairdocs.org/aircraft/N778FD), registered now
- Make and model: Boeing 757-200 SERIES
- Registry model: [Boeing 757-200 SERIES](https://openairdocs.org/model/boeing-757-200-series) (OpenAirDocs)
- Aircraft serial: 25223
- Aircraft time: 80,990 hours, 31,282 cycles
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Transmission
- Part number: 251N402234
- Part serial: 0103
- Condition: Unknown
- Location: Unknown
- Stage of operation: DE
- How discovered: O
- Nature of condition: J, O, O
- Precautionary procedure: O, O, O, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202305050813

## Discrepancy

TE FLAP DISAGREE EICAS WHEN FLAPS 20 SELECTED AT  APPROX 170 KIAS, FLAP INDICATION SHOWED BETWEEN 15  AND 20.  COMPLETED QRH 9.1.17 AND LANDED USING  FLAPS 20.EMERGENCY DECLARED.  ***EMERGENCY DECLARED***.  TROUBLESHOT IN REF TO FIM 27-51 FAULT TREE 808 WITH NO FAULTS NOTED. PERFORMED GVI OF THE L/H AND R/H FLAP DRIVE COMPONETS WITH NO FAULTS NOTED.  REMOVED AND REPLACED THE L/H I/B #4  FLAP TRANSMISSION IAW AMM 27-51-06-4. OPS CHECK GOOD WITH NO FAULTS NOTED.

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