SDR UIEA2012041200121

Service difficulty report · Web · Boeing 74747UF

Difficulty date: April 11, 2012
Submitted: April 12, 2012
Operation: Air carrier
Aircraft: N412MC
Make and model: Boeing 74747UF
Aircraft serial: 30559
Aircraft time: 53,605 hours, 8,032 cycles
System (JASC): 5720 · Wing Miscellaneous Structure
Part: Web
Part number: 65B11154416
Condition: Cracked
Location: Rt Wing
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

WHILE DOING AN "A" CHECK INSPECTION OF THE RT WING FIXED T/E INBD SPOILERS SUPPORT RIBS, A 1.5 INCHES LONG CRACK WAS FOUND ON THE WEB OF THE INBD SUPPORT RIB ASSY AT WBL 255.692. THE DAMAGE EXCEEDED THE LIMITS OF THE SRM 57-51-02, FIGURE 101. CRACK REPAIRED IAW SRM 51-70-13, REPAIR 1.

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