Service difficulty report · Governor · Dhav DHC8102

Difficulty date
July 26, 2004
Submitted
January 5, 2005
Operation
General aviation
Make and model
Dhav DHC8102
Aircraft time
34,744 hours
Engine
Pwa PW120A
Propeller
Hamstd 14SF7
Part
Governor
Part number
7897501
Condition
Malfunctioned
Location
Propeller
Stage of operation
CL
How discovered
O
Nature of condition
E
Precautionary procedure
A

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

What was found

IN CLIMB-OUT, WHILE SETTING PROP LVRS FROM 1200 TO 900 RPM, TQ INCREASED TO 105 PERCENT. DETERMINED THAT THE NR 1 ENGINE WAS THE SOURCE OF THE PROBLEM. MX REPLACED THE NR 1 PROP CONTROL UNIT, ENG ECU HARNESS, AND TQ SIGNAL CONDITION UNIT. GROUND RUNS WERE COMPLETED WITH NO FAULTS AND THE A/C WAS RETURNED TO SERV. TEARDOWN REPORTS HAVE BEEN REQUESTED FOR THE REPLACED COMPONENTS AND AN UPDATE WILL BE PROVIDED WHEN AVAILABLE.