SDR SIMA982071

Service difficulty report · Pitch Cont Unit · Saab 340B

Difficulty date
July 26, 1998
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N174AE
Make and model
Saab 340B
Aircraft serial
340B174
Engine
Ge CT79B
Part
Pitch Cont Unit
Part number
78249052
Condition
Surges
Location
Rt Engine
Stage of operation
AP
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

FPO - FLT 5711 - RIGHT PROP RPM SURGED IN EXCESS OF 1500 RPM. POWER SETTING 25-35 PERCENT TORQUE POWER REDUCTION BROUGHT SURGE TO 1360-1480 RPM. PROP DID NOT FEATHER ON ENGINE SHUTDOWN AND WILL NOT RESPOND TO FEATHERING PUMP. SURGE IS 800-100/1340 WITH CONDITION LEVERS IN MINIMUM POSITION. OIL LEAKING OUT OF COWL AT OIL COOLER DISCHARGE DUCT. REMOVED AND REPLACED RT PCU AND RT PROP TRANSFER TUBE. OPERATIONAL AND LEAK CHECK GOOD. (M)

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