SDR UIEA2026040800152

Service difficulty report · Structure · 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): 5710 · Wing Main, Frame Structure
Part: Structure
Condition: Corroded
Location: Zone 600
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

RH WING W/W STA 1241 AREA CENTER TANK RH JETTISON TRANSFER VALVE ( V52 ) CUTOUT FOUND CORROSION(<P>CORROSION AREA REMOVED AS PER SRM 51-10-02 AND REPROTECTED AS PER SRM 51-20-01, REWORK AREA MEASURED, ORIGINAL 0.496", L:4" X W:4" X D: 0.006", WITHIN SRM 57-10-10-1A-2 ALLOWABLE DAMAGE 2 FIG 101 LIMITS. NO FURTHER DEFECTS NOTED</P>)

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