Service difficulty report · Bolts · Boeing 747422

Difficulty date
June 1, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N172UA
Make and model
Boeing 747422
Aircraft serial
24363
Engine
Pwa PW4056
Part
Bolts
Part number
65B0818632
Condition
Loose
Location
Rt Mlg
Stage of operation
IN
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

RIGHT WING LANDING GEAR BEAM OUTBOARD END GATE FITTING SUPPORT ASSEMBLY (P/N 65B08186-30) SHOWED SIGNS OF MOVEMENT DUE TO BROKEN SEALANT. INSPECTION REVEALED TWO UPPER BOLTS (P/N BACB30US10K54) AND LOWER BOLTS (P/N BACB30PE10C45W) WERE LOOSE. THE BOLTS ATTACH THE GATE SUPPORT FITTING TO THE UPPER AND LOWER CHORDS OF THE WING REAR SPAR. CAUSE: LOOSE BOLTS FROM TIME SINCE NEW. VISUALLY INSPECTED AREA, RE-TORQUED BOLTS AND RESEALED AREA.