SDR UALA2012090404966

Service difficulty report · Skin · Boeing 747422

Difficulty date: September 3, 2012
Submitted: September 8, 2012
Operation: Air carrier
Aircraft: N197UA
Make and model: Boeing 747422
Aircraft serial: 26901
Aircraft time: 61,155 hours, 7,209 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

LEFT LAV TANK EXHAUST VENT CUTOUT SKIN IS CORRODED AND CRACKED APPROX .5 INCH LOWER EDGE. GAINED ACCESS, REMOVED VENT NOZZLE ASSY, STARTED REMOVING INNER DOUBLER REF AVO 1408. REMOVED DAMAGE, MANUFACTURED REPAIR PIECES, STARTED INSTALLATION. REPAIRED LEFT LAV TANK EXHAUST VENT CUTOUT PER ECRA NR 5300-01433.