# SDR DALA2018051503401

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2018
- Submitted: May 18, 2018
- Operation: Air carrier
- Aircraft: [N544US](https://openairdocs.org/aircraft/N544US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26491
- Aircraft time: 69,549 hours, 22,281 cycles
- System (JASC): [2752 · Trailing Edge Flap Actuator](https://openairdocs.org/jasc/2752)
- Part: Ball Screw
- Condition: Corroded
- Location: Te Flap
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018051503401

## Discrepancy

WHILE PERFORMING FLAP BALLSCREW INSPECTION FOUND THE NR 4 FLAP TRACK BALLSCREW TO HAVE CORROSION.  REMOVED AND REPLACED LT I/B FLAP I/B BALLSCREW IAW AMM 27-51-10 AND 11.

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