Citation Engine Upgrades

Are you still flying your Model 500 or 501/SP with -1 or -1A engines?  Do you want the most performance your engines have to offer?  Take advantage of the extra performance your Citation can provide with one of our engine enhancement upgrades.
  • Higher Cruise Speeds
  • Higher Initial Altitude
  • Faster Climb
  • Up tp 20% More Thrust at Altitude
  • Up tp 103.2 % MAX Fan Speed
See the chart below for a performance comparison. 


Performance Category -1 (original) -1A update -1B update
Takeoff Thrust 2200 lbs 2200   2200  
Max Continuous Thrust 2090 lbs 2090   2090  
Max Climb Thrust 2090 lbs 2090   2090  
Mac Cruise Thrust 2065 lbs 2065   2345 +14%
Thrust @ 25K and 0.6 Mach 700 lbs 750 +7% 750 +7%
Thrust @ 35K and 0.6 Mach 500 lbs 540 +8% 600 +20%

Note: The JTD15-1A package fits all Citation 500's - serial numbers 500-0001 thru -0349.  The JTD15-1B package fits all Citation 500's and 501 SP's.



Engine Upgrades

Description Application
JT15D-1A or 1B Update - Airframe authority to operate engines to higher fan speeds at altitude for faster climb and cruise.  Includes Trim Rings if needed.  Does NOT include Pratt & Whitney Service Bulletin to convert engines.  Does NOT include Re-marking of Fan Speed Indicators. Citation 500/501SP
Engine Fan Speed Indicators - SIERRA can provide either remaking of you fan speed indicator or an exchange overhauled unit with the correct makings for the engine upgrade you have selected. Citation 500/501SP