Service difficulty report · Actuator · Robsin R44

Difficulty date
November 29, 2005
Submitted
June 6, 2006
Operation
General aviation
Make and model
Robsin R44
Aircraft time
3,148 hours
Engine
Lyc O540F1B5
Part
Actuator
Part number
3151031
Condition
Wrong Part
Location
Starter
Component
Starter · BC3151002
Stage of operation
IN
How discovered
9
Nature of condition
W
Precautionary procedure
K

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

What was found

STARTER WAS REMOVED SLOW TO CRANK. OVERHAUL SHOP FOUND MOTOR BEARINGS FAILED/SEIZED. LINEAR ACTUATOR REMOVED WAS AN AFTER-MARKET AUTOMOTIVE PART, MADE BY UNIPOINT OF TAIWAN. THIS ACTUATOR (SOLENOID) DIFFERS FROM THE OEM PART: (1) ALIGNMENT OF MOUNTING HOLES TO ELECTRICAL TERMINALS IS ROTATED 90º; AND (2) THE TWO MAIN CONTACTOR TERMINALS ARE REVERSED. THIS COULD CAUSE CONFUSION WHEN CONNECTING POWER LEADS.