SDR 2003UALA00745

Service difficulty report · Switch · Boeing 737322

Difficulty date: October 5, 2003
Submitted: October 28, 2003
Operation: Air carrier
Aircraft: N341UA
Make and model: Boeing 737322
Aircraft serial: 24245
Aircraft time: 44,659 hours, 23,873 cycles
Engine: Ge CFM56*
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Switch
Condition: Failed
Location: Flap Proximity
Stage of operation: CL
How discovered: O
Nature of condition: F
Precautionary procedure: A

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

What was found

UNABLE TO SELECT NOSE DOWN ELEVATOR TRIM FROM BOTH YOKES. MAINTENANCE TECHNICIANS DUPLICATED THE PROBLEM ON GROUND. THE PROBLEM WAS TRACED TO A FAULTY FLAPS UP SWITCH (S245). THE SWITCH WAS REPLACED. OPERATIONAL CHECKS WERE PERFORMED SATISFACTORILY.