Service difficulty report · Transmitter · Boeing 747422

Difficulty date
October 30, 2008
Submitted
January 23, 2009
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Aircraft time
72,182 hours, 8,184 cycles
Engine
Pwa PW4056
Part
Transmitter
Condition
Unreliable
Location
Te Flap
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

EICAS "FLAPS DRIVE" WITH INBOARD T/E FLAP ASYMMETRY CMC FAULT. FOUND LT INBOARD INDICATION WAS 2.0 DEGREES WHILE OTHER FLAP INDICATIONS WERE 0.0 DEGREES. ON ARRIVAL WHILE LOWERING FLAPS THE INDICATION BECAME BLANK. REPLACED LT INBOARD RT VDT TRANSMITTER. OPS CHECKED NORMAL.