Service difficulty report · Blades · Boeing 777222

Difficulty date
April 29, 2011
Submitted
May 27, 2011
Operation
Air carrier
Aircraft
N783UA
Make and model
Boeing 777222
Aircraft serial
26950
Aircraft time
62,875 hours, 9,016 cycles
Engine
Pwa PW40903
Engine time
54,817 hours, 7,937 cycles
Part
Blades
Condition
Damaged
Location
Compressor
Part time
54,817 hours, 7,937 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 2 ENGINE FOUND MOST HPC STAGE 13 & 15 BLADES WITH L/E IMPACT DAMAGE EXCEEDING LIMITS. EXCEED LIMITS IN AREAS 'A','B','C' AND 'E' THAT ARE ALLOWED. REQUIRES ENG CHANGE. REMOVED NR 2 ENG. THIS IS PRECAUTIONARY DUE TO ECM PARAMETER SHIFT. IF CAN CONTINUE IN SERVICE AT REDUCED INSPECT INTERVAL, UPDATE CALLOUT EC4001 AND-OR EC4011 WITH INTERVAL AND FINDINGS. IF HPT OK, BORESCOPE HPC COMPRESSOR BLADES STG 5, 6, 7, 9, 11, 13. IF IN LIMITS BUT EVIDENCE OF IMPACT, BORO ALL STAGES HPC. DMG LESS THAN ABOUT 0.1 INCH DEEP MAY BE ON-WING BLENDABLE, CONTACT SFOPI FOR RPR 72-00-00 RU06. FOUND HPT BLADE AND HPC 13 AND 15 WITH DAMAGE THAT EXCEED THE MM LIMITS. PER OPBLM. NO NEED TO CONTINUE WITH THE REST OF THE COMPRESSOR BORESCOPE. ENG CHANGE REQUIRED.