Service difficulty report · Servo · Robsin R44RAVENII

Difficulty date
November 27, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Robsin R44RAVENII
Aircraft time
859 hours
Engine
Lyc IO540AE1A5
Part
Servo
Part number
D2121
Condition
Leaking
Location
Hydraulic Sys
Part time
836 hours
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) SERVO LEAKING EXCESSIVELY FROM PILOT VALVE AND LOWER SEAL. DISCOVERED DURING ANNUAL INSPECTION, A POOL OF HYDRAULIC FLUID UNDER THE SERVO AND RUNNING THE FRONT OF THE TRANSMISSION ONTO THE MOUNTS AND TRANSMISSION DECK. HYDRAULIC FLUID WAS ALSO COVERING THE BOTTOM OF THE SERVO. SERVO REMOVED FOR REPAIR.