# SDR BMAC040017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2004
- Submitted: January 26, 2005
- Operation: Air carrier
- Aircraft: [N531PA](https://openairdocs.org/aircraft/N531PA), registered now
- Make and model: Bag JETSTM3101
- Aircraft serial: 748
- Engine: Garrtt TPE33110UG
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Selector Valve
- Condition: Inoperative
- Location: Te Flaps
- Stage of operation: CR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BMAC040017

## Discrepancy

UNCOMMANDED FLAP DEPLOYMENT IN FLIGHT VERIFIED VISUALLY TO APPROXIMATELY 20 DEGREES.  FLAPS CONTINUED TO DEPLOY TOWARD 35.  UPON LANDING FLAPS RETURNED TO ZERO VERIFIED VISUALLY UNCOMMANDED.  NO HORN WAS HEARD WITH FLAPS DEPLOYED AND POWER LEVER BELOW 20 PERCENT.  REPLACED FLAP SELECTOR VALVE.  OPS CHECKED GOOD.  TEST FLIGHT FAILED.  FOUND BROKEN WIRE IN CENTER CONSOLE.  REPAIRED WIRE AND PERFORMED FUNCTIONAL CHECKS OF FLAP SYSTEM IAW AMM.  FUNCTIONAL TEST GOOD.  PERFORMED IN-FLIGHT FUNCTIONAL CHECK OF FLAPS, FOUND OPERATION NORMAL.

---
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.