Service difficulty report · Tube · Boeing 767322

Difficulty date
November 3, 2011
Submitted
December 8, 2011
Operation
Air carrier
Aircraft
N677UA
Make and model
Boeing 767322
Aircraft serial
30029
Aircraft time
37,386 hours, 9,320 cycles
Engine
Pwa PW4056
Engine time
71,809 hours, 12,790 cycles
Part
Tube
Part number
PW566R
Part serial
724699
Condition
Cracked
Location
Lt Engine
Part time
37,386 hours, 9,320 cycles
Stage of operation
NR
How discovered
O
Nature of condition
R
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

NR 1 ENG SILENT SURGE. NR 1 ENG - 6EA FAN BLADES NICKED AS MARKED. INSPECTED BLENDED FAN BLADES ON NR 1 ENG WITH EDDY CURRENT PER MM. NO CRACKS FOUND OK FOR FINAL BLEND. NR 1 ENGINE LPT COOLING TUBE CRACKED COMPLETELY THROUGH. ACPD NR 1 ENG HPC DUCT VISUAL AND VSV CHK PER MM, NO DISCREPANCIES NOTED. LPT COOLING MANIFOLD CRACKED AT 8:00. RPLD LPT COOLING MANIFOLD. DURING THE T-S'S THE IP CK VALVE WAS RMVD, CKD & REINSTALLED. POSS DUCT CLAMPING, BROKEN DUCT, HOLE IN DUCT, ETC. VERIFICATION FLIGHT CONFIRMS NORMAL OPERATION OF THE SUBJECT SYSTEM(S). TRANSMISSION OF THIS MRM CODE IS CONFIRMATION THAT THE SYSTEM(S) OPERATE NORMALLY.