SDR 2003FA0000099

Service difficulty report · Crankshaft

Difficulty date: January 28, 2003
Submitted: January 29, 2003
Operation: General aviation
Engine: Lyc IO360L2A
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Crankshaft
Condition: Damaged
Location: Engine
Stage of operation: IN
How discovered: M
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

THIS CRANKSHAFT ALONG WITH FOUR OTHERS OF SAME KIND AND AGE, HAVE EXTREMELY HEAVY GRAINULAR INDICATIONS ON JOURNALS, RADII, FLANGE RADIUS AND SEAL SURFACE WHEN VIEWED UNDER MAGNETIC PARTICLE INSPECTION, WET METHOD. THESE INDICATIONS ARE EXTREMELY RARE WITH CRANKSHAFTS, COMMON ONLY INLIGHT OF SB 549, ALTHOUGH THESE PARTS ARE NOT LISTD IN THE BULLETIN. ONE SUCH CRANKSHAFT HAS BEEN RECERTIFIED BY OEM.