SDR NSVA20070064

Service difficulty report · Potentiometer · Saab 340B

Difficulty date: March 14, 2007
Submitted: January 7, 2008
Operation: Air carrier
Aircraft: N334CJ
Make and model: Saab 340B
Aircraft serial: 334
Aircraft time: 29,006 hours, 33,355 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Potentiometer
Condition: Malfunctioned
Location: Te Flaps
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FLAPS DO NOT EXTEND FULL 20 DEGREES WHEN SELECTED SETTING OFF GPWS WARNING. SLAVED IN FLAP CONTROL BOX IAW AMM 27-51-10-04. NO JOY. RETURNED ORIGINAL BOX TO ORIGINAL CONFIGURATION. REMOVED AND REPLACED FLAP CONTROL VALVE IAW AMM 27-51-15. NO JOY. P/N ON-OFF HP1416100-5. S/N ON 1033 OFF 1370. BLED HYD SYSTEM IAW AMM 27-51-25-04. OPS CHECKS GOOD. ADJUSTED GAIN FOR FLAP CONTROL LEVER POTENTIOMETER IAW AMM 27-51-00-05. OPS CHECKS GOOD.

More about the Saab 340B