Rotax 914 Turbo missing power in takeoff

You might want to check with Airmaster, the newer AC200 controller may very well be compatable with your prop.

AC100 to AC200 Upgrade.

- - -

Do not get overly panicked about approaching the 5800 rpm limit, it does Not blow up at 5801 rpm.

A momentary overshoot is "No Harm- No Foul"

From section 05-50-00 of the Line maintenance Manual...

EXCEEDING OF MAX. ADMISSIBLE ENGINE RPM

5800-6200 rpm for Under 1 minute - Logbook Entry.  No Inspection needed.

5800-6200 rpm for Over 1 minute - Inspect Pushrods

6200-6500 rpm for Under 1 minute - Inspect Pushrods

6200-6500 rpm for Over 1 minute - Full Engine Iinspection

Over 6500 rpm - Full Engine Iinspection

I can confirm we have the old TCU, part 966473. And we don't own a dongle/cable for this type :(

Could you give any estimate on how much slower the old TCU will spool up compared to a newer TCU ?

Is it a substantial difference ?

Are there any tips regarding the old TCU other than upgrading it?

Yeah, we checked the options for upgrading the prop but didn't make a decision yet.

The AC200 upgrade requires a different type of slip ring, which is incompatible with our vacuum pump.

So we are currnetly conisdering our options, but haven't decided  yet.

Are you aware of the Prop Hub Mounted Rotax Standard SlipRing that works with the Vacuum Pump?

very good explanation by Bill,

i want to add up what to do next if RPM goes beyond limit.

maintenance required in details..................