Service difficulty report · Engine · Boeing 737990

Difficulty date
January 8, 2008
Submitted
January 11, 2008
Operation
Air carrier
Aircraft
N320AS
Make and model
Boeing 737990
Aircraft serial
33680
Aircraft time
17,185 hours, 6,651 cycles
Engine
Cfmint CFM567B26US
Engine time
17,185 hours, 6,651 cycles
Part
Engine
Part number
CFM567B26
Condition
Overspeed
Location
Nr 2
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

DURING CLIMB AT APPROX 9000FT NR 2 ENGINE STARTED SURGING. N1 RANGED FROM 60% TO IN EXCESS OF 100%. ENGINE ANTI ICE ON. PULLED NR 2 ENGINE TO IDLE. ENGINE OPERATED NORMAL AT IDLE. ENGINE NR 2 EEC BITE SHOWS FAULT 73 20322. EEC EXC PAGE SHOWS NR 2 ENGINE N1 AT 106.4% (OVERSPEED) FOR .02 SECONDS. REFERENCE LOG 6308286 FOR ENGINE REPLACEMENT.