Service difficulty report · Cylinder · Airtrc AT401

Difficulty date
August 24, 2014
Submitted
September 24, 2014
Operation
General aviation
Aircraft
N91968
Make and model
Airtrc AT401
Aircraft serial
4010942
Aircraft time
7,847 hours
Engine
Pwa R1340*
Engine time
11,415 hours
Propeller
Hamstd 23D40
Part
Cylinder
Part number
399356
Part serial
15652
Condition
Fractured
Location
Nr 2
Part time
779 hours
Stage of operation
AG
How discovered
O
Nature of condition
R, B, A
Precautionary procedure
B, A

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

What was found

AFTER TAKEOFF NR 2 CYLINDER EXHAUST VALVE STUCK IN OPEN POSITION LETTING PISTON CONTACT VALVE, BREAKING EXHAUST ROCKER HOUSING FROM CYLINDER. ACFT LOST POWER FORCING LANDING. ACFT CAUGHT FIRE.