Service difficulty report · Rocker Boss · Amtr RV9A

Difficulty date
December 14, 2010
Submitted
December 17, 2010
Operation
General aviation
Aircraft
N7965A
Make and model
Amtr RV9A
Aircraft serial
91614
Engine
Lyc IO360A1A
Part
Rocker Boss
Condition
Broken
Location
Nr 2 Cylinder
Part time
335 hours
Component
Cylinder Head
Stage of operation
CR
How discovered
O
Nature of condition
E, J
Precautionary procedure
A

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

What was found

FAILURE OF NR 2 CYLINDER ROCKER ARM BOSSES RESULTING IN ROUGH RUNNING ENGINE, DAMAGE TO ROCKER ARM COVER, AND LOSS OF OIL.