SB 632 B Lycoming Identification of Connecting Rods with Non-Conforming …

SB 632 B Lycoming Identification of Connecting Rods with Non-Conforming …

DATE: August 4, 2017 Service Bulletin No. 632B
(Supersedes Service Bulletin No. 632A)
Engineering Aspects are
FAA Approved
SUBJECT: Identification of Connecting Rods with Non-Conforming Small End Bushings
MODELS AFFECTED:
TIME OF COMPLIANCE: Within the next 10 hours of engine operation
REASON FOR REVISION: Clarified MODELS AFFECTED; added NOTICE on page 1; clarified Steps
1.B and 4.B in “Required Action”; under the “Connecting Rod Bushing Press-
Out Verification Procedure” – deleted Step 1 (reference to SB-630), added
new Steps 7, 9, and 10 and new Figure 9 for better measuring procedure for
indication of bushing movement, clarified the NOTICE after Step 11.A.(2) on
page 5; added text to “use new seals and gaskets” in Steps 11.A.(4) and
11.B.(2) on pages 5 to 6; added IO-580 and AEIO-580 engine models to row
for LW-12034 in the Top Overhaul Gasket Kit table on page 9

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