Service difficulty report · Sealant · Boeing 747422

Difficulty date
October 19, 2012
Submitted
November 16, 2012
Operation
Air carrier
Aircraft
N175UA
Make and model
Boeing 747422
Aircraft serial
24382
Aircraft time
87,230 hours, 9,846 cycles
Engine
Pwa PW4056
Part
Sealant
Condition
Missing
Location
Threshold
Stage of operation
NR
How discovered
O
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

MED 4 RIGHT SQUEAL. FOUND SEALANT MISSING BETWEEN BOTH SIDES OF THRESHOLD, FOR AND AFT. REPLACED SEALANT AND ARE WAITING FOR IT TO DRY AND THEN PRESSURIZE AGAIN. COULD MOVE THRESHOLD EDGES WITH THUMB PRESSURE AND SOUND WOULD CHANGE AS A RESULT. SEALANT NOT DRYING- REMOVING THRESHOLD PLATE IN ORDER TO RESEAL WITH SEALING HAVING BETTER SET-UP TIME. RMV'D THRESHOLD PLATE AND STARTED CLEAN (PARTIAL) CONT OF AMIS ITEM 2302010. CLEANED, RESEALED AND REINSTALLED THRESHOLD PLATE.