Service difficulty report · Turbine Blades · Boeing 777222

Difficulty date
January 18, 2012
Submitted
February 23, 2012
Operation
Air carrier
Aircraft
N785UA
Make and model
Boeing 777222
Aircraft serial
26954
Aircraft time
66,200 hours, 9,424 cycles
Engine
Pwa PW40903
Engine time
42,281 hours, 5,596 cycles
Part
Turbine Blades
Part number
PW4903
Part serial
222162
Condition
Damaged
Location
Nr 1 Engine
Part time
42,281 hours, 5,596 cycles
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

NR 1 ENG (222162) HAS 1 EA HPT TURBINE BLADE WITH BURN THROUGH INTO THE INTERNAL CAVITY ON THE CONCAVE SIDE IN AREAS 'B' AND 'C' WITH AN AREA OF LIFTED MATERIAL IN AREA 'C'. NOT ALLOWED PER AMM 72-00-00 CONFIG 2 PG 698.69. OK TO CONTINUE FOR 5 CYC TO MAX PTC 9428 FOR NR 1 ENG REPLACEMENT. REPLACED NR 1 ENG PER MM.