# SDR UPS01535614

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2001
- Submitted: April 18, 2001
- Operation: Air carrier
- Aircraft: [N432UP](https://openairdocs.org/aircraft/N432UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25463
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Control Valve
- Condition: Worn
- Location: Te Flaps
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS01535614

## Discrepancy

ATB-AIRFRAME VIBRATION DURING FLAP RETRACTION.  PER WN 578203 R&R FLAP POWER DRIVE UNIT, CONTROL VALVE PER MM 27-51-28 CHECKED FLAP CONTROL CABLE FROM COCKPIT TO CONTROL VALVE. OPERATED FLAPS THROUGH SEVERAL FULL CYCLE AND CKD ALL TRANSMISSIONS & BALL SCREWS FOR VIBRATION. CKD LEADING EDGE DEVICES THROUGH FULL TRAVEL ALL ITEMS CKD PER MM 27-51-00 NO DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.