Service difficulty report · Crankcase

Difficulty date
January 31, 2022
Submitted
January 31, 2022
Operation
General aviation
Aircraft
N389
Engine
Cont IO550B
Engine time
1,369 hours
Part
Crankcase
Part number
6566196
Part serial
R00KB905
Condition
None
Location
Engine
Part time
24 hours, 1,369 cycles
Component
Engine · Cont · IO550B39B
Component part number
NA
Stage of operation
UK
How discovered
D
Nature of condition
O
Precautionary procedure
O

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

What was found

CUSTOMER REPORTED A CRACK THAT WAS FOUND BETWEEN THE #1 AND #3 CYLINDER DECK AT THE 7TH STUD LOCATION. THE ENGINE WAS OVERHAULED PREVIOUSLY WITH ONLY 24.21 HOUR RECORDED. THE CRANKCASE WAS A CASE THAT HAD BEEN REPAIRED BY CRANKCASE SERVICES IN SAND SPRINGS OK. AND THE ENGINE WAS ASSEMBLED AND TESTED AT CONTINENTAL SERVICES WITH NO DISCREPANCIES FOUND DURING THE TESTING OF THE ENGINE. THE CRACK IS OF AN UNKNOWN CAUSE. THE ENGINE WAS DISASSEMBLED AND THE BREAK AWAY TORQUE WAS CHECKED AND NO DISCREPANCIES WERE FOUND.