SDR IPXA2014032182354

Service difficulty report · Stiffener · Boeing 7474R7F

Difficulty date: March 6, 2014
Submitted: March 21, 2014
Operation: Air carrier
Aircraft: N582UP
Make and model: Boeing 7474R7F
Aircraft serial: 29053
Aircraft time: 79,846 hours, 14,390 cycles
System (JASC): 5720 · Wing Miscellaneous Structure
Part: Stiffener
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

INSPECTION C, RT WING, AFTER CRACKED STIFFENER REMOVED FOUND SPOILER SUPPORT BEAM WEB UNDERLYING THE CRACK STIFFENER CHAFING OFF AT WBL 429.474, RT WING, WBL429.474 SPOILER SUPPORT BEAM WEB IS REPAIRED IAW HX RI RI-57-51-10491, REV A & EO B747-5720-53725-A. THIS IS A MAJOR REPAIR WITH 2024T3 CLAD 0.063", AS REPAIR WEB, 2024T3 CLAD 0.071" AS SPLICE STRAP. REPEAT DVI INSPECTIONS IS REQUIRED NOT TO EXCEED 24 MONTHS.

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