SDR UIEA2011071300436

Service difficulty report · Frame · Boeing 7472D7B

Difficulty date: July 13, 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
System (JASC): 5311 · Fuselage Main, Frame
Part: Frame
Condition: Cracked
Location: Bs 488
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

DURING ACCOMPLISHMENT OF SB 747- 53A2414 (AD 99-07-03) IAW CEO 72530A, A CRACK WAS FOUND IN THE WEB OF THE LT 488 FRAME. THE CRACK WAS FOUND BELOW THE NR1 STOP FITTING. REPAIRED BY ACCOMPLISHING A DOUBLER REPAIR IAW SRM 53-10-04, FIG 92 AS INSTRUCTED BY SB 747-53A2414.

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