Service Instruction No. 1299 B

Supersedes Service Instruction No. 1299A

September 24, 2010

MODELS AFFECTED
  • O-360 with serial numbers up to and including 19774-36A.
  • IO-360 with serial numbers up to and including 13275-51A.
  • LIO-360 with serial numbers up to and including 1062-67A.
  • O-540 with serial numbers up to and including 17269-40.
  • IO-540 with serial numbers up to and including 12775-48.
  • TIO-540 with serial numbers up to and including 3536-61a; also 3538-61A and 3539-61A.
  • LTIO-540 with serial number 522-68A.
TIME OF COMPLIANCE

During overhaul or earlier at owner’s discretion.

This revision of Service Instruction No. 1299 includes installation instructions for a new magneto drive gear P/N LW-13899 and new matching drive cushion P/N 68H22624 that are available to replace magneto drive gear LW-13642 and drive cushion LW-13641 as a matched set.

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Service Instructions
Magneto Drive Gear and Cushion Modification
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https://www.lycoming.com/sites/default/files/Magneto%20Drive%20Gear%20and%20Cushion%20Modification.pdf