Service difficulty report · Hmu · Dhav DHC8102

Difficulty date
August 10, 1999
Submitted
March 26, 2000
Operation
General aviation
Make and model
Dhav DHC8102
Engine
Pwa PW120A
Part
Hmu
Part number
7863916
Condition
Malfunctioned
Location
Engine
Part time
2,881 hours
Stage of operation
CR
Nature of condition
N
Precautionary procedure
H

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

What was found

(CAN) 10 PERCENT TORQUE FLUCTUATIONS EXPERIENCED IN CRUISE FLIGHT. ENGINE ELECTRONIC CONTROL TO MANUAL STABILIZED THE ENGINE. INSPECTION AND DIAGNOSTIC TESTING RESULTED IN HMU REPLACEMENT.