Service difficulty report · Transmitter · Boeing 747422

Difficulty date
March 23, 2013
Submitted
April 25, 2013
Operation
Air carrier
Aircraft
N120UA
Make and model
Boeing 747422
Aircraft serial
29166
Aircraft time
57,467 hours, 6,680 cycles
Engine
Pwa PW4056
Part
Transmitter
Part number
900040822
Part serial
0305
Condition
Failed
Location
Te Flaps
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

FLAPS GO TO POSITION 25 BUT INDICATOR DOES NOT SHOW GREEN (IT FLICKERS). RUNNING FLAPS WITH EDP'S HYD MOVING FLAPS FROM 30 TO 25 DUPLICATED INDICATION AND FOUND RIGHT OUTBOARD RVDT OUT OF TOLERANCE PER FIM 27-50 PAGE 131 TABLE A. TRANSMITTER PCN 480-0476. DETENT 25 READ 22.58 EXCEEDS LOWER LIMIT OF 22.71. OPS CHECKED INDICATION PER MM 27-58-00 AND -01. REPLACED RT INBOARD RVDT REF MM 27-58-01.