Q: Are there any Service Bulletins or Service Instructions pertaining to permanently removing a vacuum pump from a Lycoming engine?
I’ve noticed a Plug-Vacuum Pump Drive, P/N LW-10303, is shown in some parts manuals, but is not shown in other parts manuals.
The engine I’m currently servicing is an IO-360-C1C6, installed on a PA-28R-201 (Arrow III), built in 1978. This plane has recently had its two original gyros removed and replaced with dual Garmin GI 275 indicators.[Read more…]