Service difficulty report · Seat Track · Boeing 747422

Difficulty date
November 26, 2013
Submitted
November 27, 2013
Operation
Air carrier
Aircraft
N120UA
Make and model
Boeing 747422
Aircraft serial
29166
Aircraft time
59,645 hours, 6,899 cycles
Engine
Pwa PW4056
Part
Seat Track
Part number
140U561720
Condition
Corroded
Location
Fuselage
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

MAIN DECK SEAT TRACK AT ZONE D STATION 1658 TO 1660 RBL 40 SEAT TRACK FOUND CORRODED. CORROSION REPLACES AT BS 1580 TO 1770 RBL 40. CORROSION REMOVED IAW SRM 51-10-02, RECORD BLEND OUT CORROSION DEPTH 0.035", WIDTH 0.9", LENGTH 2". CORROSION BLEND OUT NOT WITHIN SRM 53-00-52 ALLOWABLE DAMAGE FIG 101 LIMIT. FOR REPAIR REFER TO SRM FIG 51-10-02 & REPLACEMENT PN 140U5617-20.