Aero Propulsion Technologies Documentation:
Engine Maintenance Logs

2-stroke English and 4-stroke English Engine Maintenance Logs

Rotax Aircraft Engines are quite well documented. However, for their daily operation and maintenance, pilots had to refer to a large number of documents: maintenance log, operator's, installation, maintenance and parts manuals, various service documents... Basically a whole library that hardly fits into a flight bag!

At Aero Propulsion Technologies, we have designed a document that combines all of the essential daily operation and maintenance information into a single, small, handy format:
The Engine Maintenance Log and Handy Reference.

Available in versions for 2 or 4 stroke engines and in English or French, this document really makes pilots' lifes easier.

First Part: Maintenance Log

This first part is of course a log in which hourly engine maintenance can be noted. It also contains the information found in the maintenance table provided by Rotax for their 2-stroke aircraft engines.
What sets this document apart is that it combines both in a single, easy to use solution.

The Rotax specified maintenance schedule was designed to ensure optimal durability, reliability and performance from your engine. The maintenance schedule is dictated step by step, hour after hour, and when it is followed and documented thoroughly, it will save you a lot of trouble and money by ensuring the reliability, performance and durability in addition to ensuring the resale value of your engine and aircraft.

In this example from the 4-stroke version, you can notice that at the 25 hour line, a few numbers are mentioned. You simply have to refer to the maintenance tasks table in the middle of the log...

...to find which task these number correspond to, determine if the task applies to your engine, estimate the level of difficulty and know where to find more information in the Rotax manuals.

And so on until the Time Before Overhaul (TBO) runs out. This log incorporates in an easy to use formula all the maintenance to be performed for 300 hours for the 2-strokes or up to 1500 hours for the 4-strokes.

Second Part: Handy Reference

The second part includes all sorts of useful information for the operation of your engine. Some of this information can be found here on the web site: Follow the links:

• General information: A form to fill out to have all the information about your engine handy
• Common maintenance torques: Torques for fasteners you will touch during routine maintenance
• Time Before Overhaul (4 strokes): TBOs according to your engine's serial number
• Feeding your engine: Selection of fuel, engine lubricant (2-strokes and 4-strokes), gearbox lubricant (2-strokes), oil filter (4-strokes), cooling liquid and spark plugs
• Inspections: Daily and pre-flight
• Starting: Starting procedure
• Troubleshooting: A structured approach to troubleshooting
• Operating parameters: Temperatures, pressures, speeds. Can also be found on our cheat sheets.
• Break-in (2-strokes): A grid indicating the periods at different RPMs with the addition of spaces to note the different observed temperatures
• Adjusting carburetors to atmospheric conditions (2-strokes): The formula to find which main jet to use according to the conditions
• Carburetor configurations (2-strokes): Jets, needles and adjustments used in different engines and configurations
• Engine Instruments: The how and why of instruments
• Resources and publications: Available Rotax documentation and where to find it

How to get yours

The Engine Maintenance Logs are available at Aero Propulsion Technologies. Mention that you saw them on the web site and get them for $12 instead of $15!