Service difficulty report · Shear Web · Boeing 7472D7B

Difficulty date
July 20, 2011
Submitted
July 29, 2011
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
105,635 hours, 21,872 cycles
Part
Shear Web
Condition
Cracked
Location
Bs 380-400
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

THE PURPOSE OF THIS EO, IS TO DOCUMENT A CATEGORY B REPAIR ACCOMPLISHED DURING C4 / A6 CHECK, DURING JULY 2011. INSP VISUALLY FOUND A CRACK IN THE SHEAR WEB AT S-14R BETWEEN BS 380 AND 400 DURING ROUTINE INSPECTION. THE CRACK WAS 4 IN LONG WHEN FOUND AND DOCUMENTED ON NRC FVY505261 (THE DAMAGE WAS REPAIRED BY TRIMMING OUT THE CRACK AND INSTALLING A DOUBLER, FILLERS AND ANGLES IAW SRM 53-10-04, FIG 55. SEE FIG 1 FOR DETAILS OF THE REPAIR.)

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