Service difficulty report · Stiffener · Boeing 74745EF

Difficulty date
July 29, 2026
Submitted
July 30, 2026
Operation
Air carrier
Aircraft
N485MC
Make and model
Boeing 74745EF
Aircraft serial
30607
Aircraft time
113,499 hours, 20,012 cycles
Part
Stiffener
Condition
Cracked
Location
Zone 500
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

LHW L/E CAVITY APPROX ILES 620 SUPPORT RIB ATT #3 STIFFENER FOUND CRACK ( COUNT FROM FWD )(<P>STIFFENER FABRICATED AS PER BOEING DWG 65B15696 PL REV LTR B AND RI 57-41-18367 REV A AND NEW STIFFENER HOLES TRANSFERRED AS PER SRM 51-40-05 AND NEW STIFFENER INSTALLED AS PER SRM 51-40-02. NO FURTHER DEFECTS NOTED</P>)

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