Service difficulty report · Stringer · Boeing 747422

Difficulty date
June 25, 2011
Submitted
July 21, 2011
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Aircraft time
83,190 hours, 9,435 cycles
Engine
Pwa PW4056
Part
Stringer
Condition
Corroded
Location
Bs 1800-1960
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

FOUND STR 51R CORRODED BETWEEN STA 1800 TO 1960. SKIN HAS BULGED SKIN AT STA 1944. REPLACED S51R. INSTALLED DOUBLER REPAIR.