Lycoming Service Bulletin No. 632B
http://www.lycoming.com/content/service-bulletin-no-632-b. This revision supersedes Service Bulletin No. 632A.
If you have completed the requirements of Service Bulletin 632 or 632A, you are in compliance with this Service Bulletin, no further action is required.
Paul Skinner
Chief, Aircraft Management
pskinner@capnhq.gov
877-227-9142 ext 273