SDR E5ZR2018061300177

Service difficulty report · Connecting Rod · Beech 95B55

Difficulty date: May 21, 2018
Submitted: June 13, 2018
Operation: General aviation
Filed by: E5ZR316Y
Signature Engines
Aircraft: N206S
Make and model: Beech 95B55
Aircraft serial: TC873
Aircraft time: 3,748 hours
Engine: Cont IO520E
Engine time: 951 hours
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Connecting Rod
Part number: 655910
Condition: Oil Starvation
Location: Nr 5 Cylinder
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

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

What was found

AFTER TEARING DOWN OF THE ENGINE, THE NR 5 CYLINDER FAILED DUE TO OIL STARVATION OF THE CONNECTING ROD CAP FOR UNKNOWN REASONS. THIS CAUSED FAILURE OF THE ROD CAP BOLTS. THE CAP BOLTS STRETCHED, SNAPPED AND THEY SHOW SIGNS OF BURN MARKS.

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