Service difficulty report · Governor · Robsin R44

Difficulty date
June 30, 2005
Submitted
August 3, 2005
Operation
General aviation
Make and model
Robsin R44
Aircraft time
804 hours
Engine
Lyc O540F1B5
Part
Governor
Condition
Overspeed
Location
Rotor
Stage of operation
HO
How discovered
O
Nature of condition
W
Precautionary procedure
A

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

What was found

WHILE MOVING HELICOPTER IN A HOVER, PILOT NOTICED A POWER ON OVERSPEED AT APROX 114 PERCENT ROTOR AND ENGINE. GOVERNOR WAS CONFIRMED TO BE ON BY THE PILOT. GOVERNOR SWITCH RESET BETWEEN OFF AND ON POSITION WITHOUT A CHANGE. IMMEDIATE LANDING CARRIED OUT. SUBSEQUENT TEST HAS BEEN MADE ON THE GOVERNOR WHICH SEEMED TO WORK FINE. CONDITIONAL OVERSPEED INSPECTION CARRIED OUT PER R44 MM 2.540 AND ENGINE SB 369 J. NO MAJOR PROBLEM FOUND. BLADE BOLTS REPLACED AS A PRECAUTIONARY MEASURE. GOVERNOR ISSUE WILL BE DISCUSSED WITH RHC CIE.