Service difficulty report · Stringer · Boeing 7472D7B

Difficulty date
July 22, 2011
Submitted
August 10, 2011
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
105,635 hours, 21,872 cycles
Part
Stringer
Condition
Corroded
Location
Bs 890-910 S42l
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

STRINGER 42L WAS FOUND WITH A CORROSION LOCATED AT BS 890 TO BS 910. THE CORROSION WAS FOUND DURING NORMAL CHECK INSPECTIONS OF THE FWD CARGO COMPARTMENT BILGE AREA. THE CORROSION WAS APPROX 1INCH WIDE BY 3 INCH LONG AND APPROX 0.034 INCH DEEP. THE CORRODED STRINGER WAS REPAIRED IAW SRM 53-10-03, FIG 1. THE SRM REPAIR TRIMS THE DAMAGED AREA, FABRICATES A REPLACEMENT SECTION AND INSTALLS A DOUBLER AT EACH END.

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