Lycoming Connecting Rods Ad

Lycoming engin es formerly textron lycoming 360 and 540 series reciprocating.

Lycoming connecting rods ad.

Lycoming engines mandatory service bulletin msb no. The faa issued an ad requiring operators of lycoming engines to inspect and possibly replace off spec connecting rod small end bushings in engines overhauled between november 2015 and february 2017. On my o 320 rods the bearing notch on the connecting rod piece not the cap piece is on the same side as the cylinder number stamp. Faa proposes emergency ad for lycoming rods if this is your first visit be sure to check out the faq by clicking the link above.

Clarified connecting rod bolt selection and installation instructions added new figure 1 revised part numbers in table 1 and added information from obsolete service. After the effective date of. 0 0 12 24 2014 11 33 pm 5. Click the register link above to proceed.

In late july as tens of thousands of ga aircraft owners were converging on oshkosh for airventure 2017 lycoming published mandatory service bulletin 632 titled identification of connecting rods with non conforming small end bushings this was a very nasty service bulletin affecting lycoming engines of all models that were built rebuilt overhauled or repaired during the past two years. We are issuing this ad to prevent connecting rod failure. Use of a connecting rod stamped with an s will ensure that the weight match between rods is always within the tolerance allowed by the lycoming specification for that particular part number. Whenever new connecting rods and or new connecting rod bolts are being installed.

You may have to register before you can post. All supported lycoming reciprocating aircraft engines. The msb describes procedures for inspecting connecting rods and replacing connecting rod small end bushings. Related service information under 1 cfr part 51.

The faa has issued an airworthiness directive ad for the connecting rods in certain models of lycoming engines and asked for comments on the ad 2017 16 11. If a piston is to be replaced it is strongly recommended that the power plant mechanic refer to lycoming service instruction no. For the purpose of this ad connecting rod accessibility is defined as any maintenance action in which a cylinder assembly is removed for maintenance.