Service difficulty report · Sensor · Boeing 757222

Difficulty date
December 30, 2011
Submitted
January 26, 2012
Operation
Air carrier
Aircraft
N556UA
Make and model
Boeing 757222
Aircraft serial
26650
Aircraft time
64,510 hours, 23,807 cycles
Engine
Pwa PW2037
Part
Sensor
Condition
Malfunctioned
Location
Te Flap Pdu
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

AIRCRAFT FAILED ALTERNATE EXTEND TEST. RIGHT NEEDLE GOES TO APPROXIMATELY 12 DEGREES WHEN KNOB TURNED TO 1 DEGREE POSITION. TEST THAT FAILS IS JOB CARD 5-5010-B STEP 6D3. THE REST OF TEST PASSED. CHANGED RELAY K1024 4. SWAPPED & RETURNED FSEU2 AND FSEU3. REPLACED AND RETURNED ORIGINAL FSEU1. ALL NO HELP. CLEANED AND SECURED PDU POSITION SENSOR, OPERATED ALT FLAPS FEW TIMES, OP CHECK OK.