SDR 96ZZZX2558

Service difficulty report · Camshaft · Bbavia 7KCAB

Difficulty date
January 24, 1996
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N8643
Make and model
Bbavia 7KCAB
Aircraft serial
35473
Engine
Lyc IO320E2A
Part
Camshaft
Part number
SL18840
Condition
Damaged
Location
Lobes
Part time
84 hours
Stage of operation
IN
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

ANNUAL INSPECTION - LARGE AMOUNT OF METAL FRAGMENTS IN OIL PRESSURE AND OIL SUCTION SCREENS. CYLINDERS REMOVED, 7 LIFTER BODIES NOT TURNING, ENGINE TEAR-DOWN REVEALED VERY LITTLE TAPER ON CAM LOBE TIPS EXCEPT NR 4 EXHAUST LUBE. IT HAD .001 INCH TAPER AND WAS TURNING. FURTHER INVESTIGATION REVEALED NR 3 CONNECTING ROD AND NR 3 ROD JOURNAL SCORED BADLY RENDERING CRANKSHAFT AND NR 3 ROD UNREPAIRABLE DUE TO LARGE FRAGMENT FROM NR 2 INTAKE LIFTER BODY PASSING THROUGH OIL SUCTION SCREEN AND BACK INTO OIL SYSTEM.