Engine Overhauls and Upgrades

At Elliott Aviation, we can provide you some of the most competitive pricing in the industry for engine overhauls on your King Air, Beechjet, Hawker, Citation, and more. We will work with you to determine the best options for you from a cost and performance standpoint whether it be an overhaul, upgrade, or exchange. In addition, we will complete your engine removal and reinstallation in the most efficient manner. We will manage your project throughout and give you the highest level of support with your engine supplier.

About Engine Overhauls

During an engine overhaul, all portions of the engine are disassembled, cleaned, inspected, reassembled, tested (ensure the facility you will be using has an appropriate test cell to run the engine off-wing through all parameters) and shipped back to the installation agency. The engine consists of four major sections as follows: Accessory Gearbox, Gas Generator section, Power Section and Reduction Gearbox. Engine accessories that will also be overhauled at that time are as follows: Fuel control unit, fuel pump, fuel nozzles, fuel flow divider, fuel oil heater, constant speed governor, heated tubes, and ignition unit. During the overhaul, and any mandatory service bulletins can be embodied. It is also a time when any optional service bulletins may be reviewed and completed if a customer elects to do so.

About Hot Sections

During a Hot Section Inspection, all hot section engine components are inspected to make sure they can generate enough power for efficiency and safety. This includes turbine blades, compressor inlet, CT shroud segments, and more.

Engine Overhauls


  • King Air 90 – All Pratt & Whitney PT6A Models
  • King Air 200 – All Pratt & Whitney PT6A Models
  • King Air 300 – Pratt & Whitney PT6A-60A
  • King Air 350 – Pratt & Whitney PT6A-60A


  • Pratt & Whitney JT15D-5


  • Hawker 750 – Honeywell TFE-731-5BR
  • Hawker 800/800A/800XP/850XP – TFE-731 Series
  • Hawker 900XP – TFE-731-50R
  • Hawker 1000 – Pratt & Whitney 305B


  • Pratt & Whitney JT15D-5


  • Williams FJ44-2A


  • Phenom 100 – Pratt & Whitney 617F
  • Phenom 300 – Pratt & Whitney 535E


  • Citation II 500/551 – Pratt & Whitney JT15D-4
  • Citation SII S550 – JT15D-5A
  • Citation Bravo 550 – Pratt & Whitney 530A
  • Citation V 560 – JT15D-5A
  • Citation V Ultra – Pratt & Whitney JT15D-5D
  • Citation Encore/Encore+ – Pratt & Whitney 535A
  • Citation Excel 560XL – Pratt & Whitney 545A
  • Citation Citation XLS/XLS+ – Pratt & Whitney 545B
  • Citation 650 III, VI, VII – Honeywell TFE731 Series

Engine Upgrades


For the C90 there are a couple of choices for engine upgrades. Blackhawk offers an XP135A upgrade that provides an increased airspeed and reduced operating costs. GE Aviation offers the H17 engine, which boasts 750 shaft horsepower. This increases the cruise speed while allowing for a reduced fuel burn. Another choice for both the C90 and F90 is the Pratt & Whitney PT6-135A engine. This engine is also rated at 750 shaft horsepower. Operators can expect a 20 to 30-knot increase in cruise speed for any of these engine upgrades.


For the King Air 200 users, there are three engine upgrade options, the Pratt & Whitney PT6A-42, PT6A-52, and PT6A-61. For the King Air 200 operator, the original Pratt & Whitney PT6A-41 engines can be fitted with any of these engines.

For King Air 200 operators, it can make a lot of sense to upgrade to the -42 engine, rather than overhauling their existing -41 engines. This is the least expensive of the three options and provides modest performance gains. However, the biggest benefit is that it replaces a 30-40-year-old engine with a newly manufactured one.

The other engine upgrade options are for a -52 or -61 model. These two engines are very similar, with the -52 providing a slight cruise speed increase over the -61. In either case, you can expect to realize a 17 kt. increase in cruise speed for the -61, and a 26 kt. increase for the -52.


Blackhawk’s XP67A engine upgrade is now available. It is expected for this upgrade to have an increased rate of climb, shorter high/hot take-offs, faster cruise speeds, and a higher single-engine service ceiling. The installation will include two factory-new MT five-blade composite propellers