SDR CALA2016050495336

Service difficulty report · Skin · Boeing 747422

Difficulty date: May 3, 2016
Submitted: May 4, 2016
Operation: Air carrier
Aircraft: N178UA
Make and model: Boeing 747422
Aircraft serial: 24385
Aircraft time: 103,694 hours, 12,225 cycles
Engine: Pwa PW4056
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Condition: Corroded
Location: Fuselage
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

AFT CARGO COMPARTMENT, BS 1720 - 1740, STRINGER 50L - 51L, BILGE AREA INTERNAL FUSELAGE SKIN CORRODED. REMOVED CORROSION & FOUND BLEND OUT BEYOND SRM LIMITS. REMOVED DAMAGED SKIN. ACCOMPLISHED DVI, INSPECTION OF SURFACE & FASTENER HOLES IAW ECRA 5330-05676. FABRICATED & INSTALLED FILLER & 2 EACH REPAIR DOUBLERS, TRIPLER, IAW ECRA.