SDR UIEA2026041500197

Service difficulty report · Skin · 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): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Condition: Corroded
Location: Zone 100
Stage of operation: IN
How discovered: E
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

CORROSION FOUND AT STA 1720 S44L SKIN INNER SURFACE ( APPROX 2.5" X 2.25" )(<P>CORROSION REMOVED AS PER SRM 51-10-02 AND REPROTECTED AS PER SRM 51-20-01, REWORK AREA MEASURED ORG: 0.071", L: 6" X W: 2.5" X D: 0.006", WITHIN SRM 53-00-01-1A-1 ALLOWABLE DAMAGE 1 FIG 101 LIMITS. NO FURTHER DEFECTS NOTED</P>)

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