Bell 206 Jet Ranger with Allison 250

[HeliEng]

Calling anyone out there with Jet Ranger experience. Has anyone ever experienced the following problem?

Start the aircraft up, and set to Ground Idle, try to roll the throttle on, to increase to Flight Idle, rpm increases and then drops back down to Ground Idle. It will not go to Flight.

Anyone know of a cause or heard of this problem before?

Let me know


SOME DAYS YOU ARE THE STATUE AND SOME DAYS YOU ARE THE PIGEON!!!

[Deeko01]

Fuel Control Unit or Fuel Pump??

[sprocket]

They wont' accelerate if the FCU can't sense the PC. Check for air leaks/blockages in the PC lines. If the FCU/GOV lines had been disturbed it is easy to get crap in them. This is one of many possiblities, so check the troubleshooting table in the 250 O&M

Also is it a Bendix or Ceco system?