Service difficulty report · Cylinder Head

Difficulty date
July 17, 2026
Submitted
July 17, 2026
Operation
General aviation
Aircraft
N719LL
Engine
Cont TSIO550K
Engine time
1,223 hours
Part
Cylinder Head
Part number
658815A3
Part serial
AC16EA862
Condition
Cracked
Location
Nr 3
Part time
1,223 hours
Component
Engine · Cont
Component part number
TSIO550K
Stage of operation
IN
How discovered
W
Nature of condition
O, O, O
Precautionary procedure
K

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

What was found

NUMBER 3 CYLINDER OIL LEAK. STILL LEAKING AFTER REPLACING ROCKER BOX GASKETS AND PUSHROD TUBE SEALS. DETAILED VISUAL INSPECTION REVEALED A 2.5 INCH CRACK IN THE WEBBING SUPPORT BETWEEN THE TWO ROCKER BOXES. CYLINDER REMOVED AND REPLACED WITH NEW.