# SDR QML2005F00001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2005
- Submitted: December 21, 2005
- Operation: Air carrier
- Aircraft: [N912NM](https://openairdocs.org/aircraft/N912NM), registered now
- Make and model: Pilats PC12
- Aircraft serial: 169
- Engine: Pwa PT6*
- System (JASC): [2752 · Trailing Edge Flap Actuator](https://openairdocs.org/jasc/2752)
- Part: Actuator
- Part number: 9787320308
- Part serial: 0802
- Condition: Inoperative
- Location: Te Flaps
- Part time: 3,625 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QML2005F00001

## Discrepancy

WHEN THE AIRCRAFT IS FLOWN AT VERY LOW TEMPERATURES (BELOW -15 C) FOR MORE THAN 30 MINUTES, AND THE FLAPS ARE SELECTED THE FLAPS FAIL TO MOVE, FLAP WARNING IS GIVEN ON THE CAWS PANEL AND THE FLAPS ARE RENDERED INOPERATIVE.  ONCE THE AIRCRAFT IS ON THE GROUND, AT WARMER TEMPERATURES, THE FLAP RESET IS USED, AND ACTUATORS BECOME HARD TO TURN WHEN COLD.  THIS IS VERIFIED BY PERFORMING THE CURRENT DRAW TEST IAW THE MFG MM.  IT IS RECOMMENDED THAT THE FLAP ACTUATORS BE REDESIGNED TO TOLERATE THE LOWER TEMPERATURES OR AN SIMPLER AND EASIER FIX WOULD BE TO INSTALL HEATERS ON EACH FLAP ACTUATOR TO KEEP THEM WARM ENOUGH TO FUNCTION PROPERLY.  (K)

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