I noticed in an earlier post that there was a discussion on the OSG check so I thought I would throw this in. There is a rather LARGE spread between the requirements for the OSG check in the POH/AFM’s from Commander and the recommendations from Honeywell. The 840 AFTER START BEFORE TAXI ck list set: “Overspeed Governor - CHECK prior to first flight of day, when in flight engine shutdowns and airstarts are
to be accomplished, or any maintenance or adjustment has been performed. Propeller must be on start locks.”
Where as Honeywellhas differing ideas. This from Honeywell in their TPE 331 Pilot Tips:
THE OVERSPEED GOVERNOR (OSG) CHECK IS ACCOMPLISHED PRIOR TO DISENGAGEMENT OF THE
START LOCKS; UNLESS DIRECTED DIFFERENTLY IN THE AFM/POH, THE OSG CHECK SHOULD BE MADE EVERY 50 FLIGHT HOURS FOR THE Honeywell Electronic Fuel Control AND EVERY 300 FLIGHT HOURS FOR THE WOODWARD AND BENDIX FUEL CONTROL SYSTEMS, PRIOR TO EACH FLIGHT WHEN AIR STARTS ARE TO BE INTENTIONALLY MADE, IF THERE IS ANY INDICATION OF A
MALFUNCTION, OR WHEN ANY MAINTENANCE OR ADJUSTMENTS INVOLVING THE ENGINE CONTROL
SYSTEM HAVE BEEN PERFORMED.
If you need a copy of the TPE 331 PILOT TIPS publication email me at firstname.lastname@example.org and I will be happy to send you a PDF copy of the latest one I have.
White Aviation Services, Inc