Service difficulty report · Bypass Valve · Boeing 767322

Difficulty date
September 29, 2008
Submitted
October 2, 2008
Operation
Air carrier
Aircraft
N666UA
Make and model
Boeing 767322
Aircraft serial
29238
Aircraft time
35,974 hours, 10,093 cycles
Engine
Pwa PW4056
Part
Bypass Valve
Part number
S256T0058
Condition
Faulty
Location
T/E Flap
Stage of operation
IN
How discovered
C
Nature of condition
W
Precautionary procedure
O

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

What was found

ALTERNATE T/E FLAP DRIVE ELECTRIC MOTOR RUNS BUT DOES NOT TURN GEARBOX TO EXTEND FLAPS. REPLACED T/E FLAP BYPASS VALVE. OP CHECKS NORMAL.