Service difficulty report · Camshaft · Beech 58

Difficulty date
May 10, 2006
Submitted
May 23, 2006
Operation
General aviation
Aircraft
N866SH
Make and model
Beech 58
Aircraft serial
TH1083
Engine
Cont IO520CB
Propeller
Hartzl BHCJ2YF2C
Part
Camshaft
Condition
Worn
Location
Engine
Stage of operation
IN
How discovered
V
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

COMPRESSION CHECKED ENGINE, NR 2 CYLINDER 40/80. REMOVED NR 2 CYL FOR REPAIR. INSP INSIDE OF ENG, FOUND NR 1 CYL EXHAUST LIFTER/CAM LOBE BADLY WORN. UNKNOWN HOW LONG IT HAS BEEN LIKE THIS, KNOW IT WOULD NOT HAVE LASTED TOO MUCH LONGER. REBUILT/ZERO TIMED. AIRPLANE SHOWN TO HAVE FLOWN AS LITTLE AS 5 HRS IN 9 MONTHS. SUSPECT TOO LONG PERIOD BETWEEN ENGINE RUNS, LOSING OIL FILM ON LIFTER/LOBE CONTACT, MAYBE LITTLE CORROSION, CAUSING METAL /METAL WEAR AND (GALLING) BEARING SURFACES. HAVE BEEN PULLING WAY TOO MANY CYLINDERS LATELY DUE TO LONG PERIODS OF STORAGE OF AIRCRAFT THAT WERE NOT PRESERVED FOR STORAGE. (K)

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