Service difficulty report · Solenoid Valve · Boeing 737291

Difficulty date
October 24, 1995
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N974UA
Make and model
Boeing 737291
Aircraft serial
21597
Engine
Pwa JT8D17
Part
Solenoid Valve
Part number
1FA061014
Condition
Inoperative
Location
Aileron
Stage of operation
CR
Nature of condition
F
Precautionary procedure
H

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

What was found

AUTOPILOT AILERON CHANNEL INITIATES UNCOMMANDED BANKS IN HEADING HOLD MODE - POPS C.B.D.C. ALSO, CAUSES A 1000 FOOT CLIMB OR DESCENT. REPLACED B-SYSTEM AILERON SOLENOID VALVE AND PERFORMED LEAK CHECK. ALSO, PERFORMED AUTOPILOT FUNCTION TEST, ROLL CHANNEL CAT II TEST, AND PITCH AND CONTROLLER CAT II TEST. CHECKED O.K.