Service difficulty report · Rub Strip · Boeing 747422

Difficulty date
July 19, 2012
Submitted
August 24, 2012
Operation
Air carrier
Aircraft
N182UA
Make and model
Boeing 747422
Aircraft serial
25279
Aircraft time
88,004 hours, 10,643 cycles
Engine
Pwa PW4056
Part
Rub Strip
Condition
Worn
Location
Thrust Reverser
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

NR 2 ENGINE INBOARD THRUST REVERSER HALF LOWER FWD COWL FLANGE WHERE RUB STRIP ATTACHES HAS AN AREA WORN 18 INCHES LONG AND A DEPTH HALF THE THICKNESS OF THE FLANGE AND .250 WIDE. REMOVED DAMAGED FLANGE APPROX 27.125 LONG AND 10 INCHES UP FROM BOTTOM. REMOVED SEALANT FORWARD FASTENERS AND BEGAN MFG OF FWD FILLER AND DOUBLER. ALSO HAD INSPECTOR ACCOMPLISHED HFEC AND VISUAL INSPECTION. MANUFACTURED PARTS AND PRIMED, IN DRYING OVEN, DRILL NEW RUB STRIP AND INSTALLED PARTS.