SDR UIEA2026041700210

Service difficulty report · Doubler · Boeing 74747UF

Difficulty date: May 23, 2026
Submitted: May 27, 2026
Operation: Air carrier
Aircraft: N477MC
Make and model: Boeing 74747UF
Aircraft serial: 29255
Aircraft time: 108,821 hours, 19,065 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Doubler
Condition: Corroded
Location: Floor Support
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

U/D LBL 10" - LBL 14" BS 480-500 FLOOR SUPPORT WEB ATT. DOUBLER CORROSION(<P>DOUBLER FABRICATED AS PER DWG 141U5422, AND PL DOUBLER REPLACED AS PER SRM 51-10-02, AND NEW DOUBLER HOLES TRANSFERRED AS PER SRM 51-40-05, AND NEW DOUBLER INSTALLED AS PER SRM 51-40-00. NO FURTHER DEFECTS NOTED</P>)

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