Service difficulty report · Eec · Boeing 757251

Difficulty date
May 29, 2017
Submitted
May 30, 2017
Operation
Air carrier
Aircraft
N552NW
Make and model
Boeing 757251
Aircraft serial
26499
Aircraft time
42,797 hours, 19,446 cycles
Engine
Pwa PW2037
Engine time
70,277 hours, 23,921 cycles
Part
Eec
Condition
Malfunctioned
Location
Rt Engine
Stage of operation
CR
How discovered
O
Nature of condition
R, J
Precautionary procedure
A

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

What was found

DIVERTED DUE TO A RT ENGINE ROLL BACK WITH SMALL COMPRESSOR STALLS. ENGINE WAS NOT SHUT DOWN. FOUND NUMEROUS EPCS MESSAGES RELATED TO THE EEC. ENGINE INSPECTIONS PERFORMED. BORESCOPE INSPECTION PERFORMED. ALL CHECKED GOOD. EEC AND THE 14TH STAGE BLEED CONVERTER VALVE WERE REPLACED. ENGINE RUNS PERFORMED WITH NO FURTHER DISCREPANCIES.