SDR UALA2013052903735

Service difficulty report · Vane · Boeing 777222

Difficulty date: May 27, 2013
Submitted: July 25, 2013
Operation: Air carrier
Aircraft: N216UA
Make and model: Boeing 777222
Aircraft serial: 30549
Aircraft time: 53,958 hours, 6,734 cycles
Engine: Pwa PW4090
Engine time: 45,698 hours, 5,914 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Vane
Condition: Burned
Location: Nr 1 Engine
Part time: 45,698 hours, 5,914 cycles
Stage of operation: IN
How discovered: B
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

NR 1 ENGINE HPT FIRST STAGE VANES HAS ONE VANE BURNED THRU ON OD PLATFORM THAT EXTENDS INTO THE PLATFORM FILLET RADIUS LOCATED BEHIND LOWER IGNITER PLUG. ACCOMPLISHED NR 1 ENGINE BOROSCOPE INSPECTION OF HPT NGV. IAW DISPOSITION ECRA 7200-03291 MEASURES LESS THAN .050 SQ INCH AND LESS THAN .250" IN DIAMETER, OK FOR 30 CYCLE REPETITIVE INSPECTIONS. DURING REBOROSCOPE INSPECTION OF ABOVE DISCREPANCY NOTED MORE BREAKTHROUGH MATERIAL ON OD PLATFORM F123107 OF ADJACENT VANE LARGER THAN 0.500 SQ. INCH AND INSIDE FILLET RADIUS. REPLACED ENGINE.