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SDR 98ZZZX2028

Open the Markdown

Service difficulty report · Piston Pin

FAA SDR system

Difficulty date
May 3, 1998
Submitted
March 26, 2000
Operation
General aviation
Engine
Lyc IO360A3B6
System (JASC)
8530 · Reciprocating Engine Cylinder Section
Part
Piston Pin
Part number
AL14077
Condition
Failed
Location
Nr 4 Cylinder
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

WHILE C/W DIFFERENTIAL COMPRESSION CHECK FOUND BLOW-BY ON THE NR 4 CYLINDER PRESSURIZING THE CRANKCASE, AIR COMING OUT OF THE OIL FILLER TUBE. UPON NR 4 CYLINDER REMOVAL, FOUND ONE PISTON PIN PLUG WORN AWAY. CYLINDER WAS WORN WHERE THE PISTON PIN WAS MAKING CONTACT WITH THE CYLINDER WALL. REMOVED OIL FILTER AND FOUND METAL CONTAMINATION. REMOVED FINGER SCREEN AND FOUND ALUMINUM SLIVERS AND SCRAPINGS.