SDR 2019F00022

Service difficulty report · Pulley · Piagio P180

Difficulty date
February 22, 2019
Submitted
February 22, 2019
Operation
General aviation
Aircraft
N490JD
Make and model
Piagio P180
Aircraft serial
1150
Aircraft time
7,413 hours, 5,791 cycles
Part
Pulley
Part number
MS202202
Part serial
NA
Condition
Failed
Location
Rudder
Part time
7,413 hours, 5,791 cycles
Stage of operation
IN
How discovered
V
Nature of condition
Z
Precautionary procedure
K

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

What was found

DURING A SCHEDULED 200FH INSPECTION AS REQUIRED BY CHAPTER 05-00-00, THE LEFT LOWER RUDDER PULLEY, IT WAS NOTICED THAT THE LOWER LEFT RUDDER PULLEY WAS APPROXIMATELY 1/4" HIGHER THEN THE RIGHT PULLEY. UPON REMOVAL OF THE PULLEY, THE BEARING AND RACE WAS FROZEN AND HAD WORN ELLIPTICALLY. THIS CASUED THE BEARINGS TO FALL TO ONE SIDE WITHOUT FALLING OUT RESULTING IN A BINDING CONDITION AND CAUSING EXCESSIVE CABLE WEAR ON THE PULLEY. ALTHOUGH THERE IS EVIDENCE OF PREVIOUS LUBRICATION, THE BEARING AND ASSOCIATED PIECES ARE OF A DRY RUSTY APPEARANCE. UPON REMOVING THE RIGHT PULLEY, THE BEARING IT WAS DISCOVERED THAT THE BEARING WAS SEIZED AND AGAIN SHOWED SIGN OF PREVIOUS LUBRICATION. THIS INSTALLATION IS IN AN EXPOSED PORTION OF THE TAIL CONE AREA SUSCEPTIBLE TO MOISTURE CONTAMINATION