Service difficulty report · Intercostal · 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
Intercostal
Condition
Corroded
Location
Fuselage
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

MAIN DECK FLOOR SUPPORT AT STATION 980, LBL 40 IS CORRODED. CORRODED FLOOR INTERCOSTAL REPAIRED AT BS 940 TO BS 1003 LBL 40, CORROSION REMOVED IAW SRM 51-10-02. RECORD BLEND OUT CORROSION DEPTH 0.032 WIDTH 0.9 INCHES, LENGTH 1.5. CORROSION BLEND OUT NOT WITHIN SRM 53-00-5 ALLOWABLE DAMAGE FIG 101 LIMITS. FOR REPAIR, REFER TO ECRA 5320-02190 REV O.