A C172 ENG WAS OVERHAULED IN NON COMPLIANCE WITH THE MANUFACTURER'S SVC BULLETIN.

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I OWN AND AM FLYING AN ACFT WITH DEFECTIVE CONNECTING RODS AND OTHER PARTS IN THE ENG; WHICH I CONSIDER DANGEROUS. THE DEFECTIVE PARTS ARE THE RESULTS OF AN ENG OVERHAUL. THE DETAILS ARE AS FOLLOWS: 1) FBO DID NOT COMPLY WITH TCM OVERHAUL MANUAL X30594A; PAGE 72-30-13; ITEM 35 WHICH MANDATES THAT CONNECTING RODS STAMPED 626119 MUST BE REPLACED. THEY ALSO IGNORED TCM SB M86-11 WHICH COVERS THE SAME SUBJECT. TCM CSB96-13 IS ALSO APPLICABLE BECAUSE FBO PULLED #5 CYLINDER ON DEC/XX/96; 1 MONTH AFTER CSB96-13 WAS ISSUED (SEE ENCLOSURE C). THE CONNECTING RODS IN MY ENG WERE INSTALLED IN 1977 AND WERE STAMPED 626119 AND ARE LESS THAN 0.610 NOT 0.625 AS REQUIRED. I CONTACTED ZZZ FSDO AND RECEIVED A LUDICROUS REPLY (ENCLOSURE D). I FILED A CIVIL COMPLAINT FOR THE COST OF REPLACING THE CONNECTING RODS AND WAS DENIED. I NOW HAVE 1 OF 2 OPTIONS: 1) KEEP THE ACFT AND PAY FOR THE REPLACEMENT OF THE CONNECTING RODS AND OTHER PARTS THAT I CONSIDER DEFECTIVE; OR 2) SELL THE ACFT 'AS IS' AND LET THE BUYER BEWARE. I HAVE CHOSEN TO SELL THE ACFT. APPARENTLY I AM THE ONLY PERSON WHO CONSIDERS THE ENG DANGEROUS. TCM IS NOT OVERLY CONCERNED; IT TOOK ME 10 MONTHS TO GET A COPY OF X30594A OVERHAUL MANUAL. FURTHERMORE; THEY DO NOT HAVE THE AUTH TO ENFORCE THEIR OVERHAUL REQUIREMENTS; NO ONE DOES. THE SVC BULLETINS ARE A FARCE. THE ONLY LEGAL ASPECT IS THAT FBO STATED ON MY INVOICE THAT THEY HAD COMPLIED WITH THE MANUAL X30594A. I BASED MY CIVIL COMPLAINT ON THE PREMISES THAT THEY HAD LIED TO ME; BUT TO NO AVAIL. EVEN THE FSDO CONDONES FBO USE OF THE OLD CONNECTING RODS AND OTHER JUNK PARTS THEY CONSIDER 'SVCABLE.'