Engine Overhauls and Maintenance


Hancock Enterprises, Inc. has been your primary source for all things turbine since 1982. We are a Certified FAA and EASA Repair Station and specialize in the maintenance and repair of the Honeywell TPE 331 and the Pratt and Whitney PT6 turbine engines. We also offer a HELP Program for the aging Honeywell Pre Century engines. We offer an onsite Hot Section Inspection on all PT6 Engines. We at Hancock Enterprises, Inc. understand that time is money and we offer a 24/7 AOG service to help aid in getting your aircraft back up and running as soon as possible. We work on your schedule, not ours.  We also offer Borescope Inspections for both TPE331 and PT6 Engines. This will show you the condition of your engine and can be performed either at your facility or ours. This inspection can be performed for your own peace of mind, for pre-purchase inspections, at nozzle changes, or to comply with your Pratt and Whitney or Honeywell engine maintenance programs. 

Contact our team to get a quote on repairing or overhauling your engine.

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Check to see if we service your engine model.

Some common engine areas of emphasis:

  • Overhaul 
  • Gear box Inspections 
  • Hot Section Inspections 
  • CAM  Inspection 
  • TBO Extensions 
  • Engine Conversions 
  • Lighting Strike Inspections 
  • Prop Strike Inspections 
  • Corrosion Inspections
  • Insurance Claims 
  • Borescope Inspections 
  • Test Cell 
  • Lebow and Recomp Runs 
  • Vibe Surveys 
  • FOD
  • DOD
  • Hot Starts 
  • Bog Downs 
  • Thermal Distress 
  • Sudden Stoppage 

Fuel Nozzle Program

Fuel Nozzle Maintenance and Overhaul is the major factor affecting the life and performance of turbine engine hot sections. Honeywell recommends replacement every 400 hours for simplex nozzles and 350 for duplex nozzles. We recommend replacement every 300 hours for both types of nozzles. This will help extend the life of your hot section and keep it from looking like the hot section pictured. Being diligent about this critical maintenance procedure will save the operator money over the life of the hot section.  Borescoping at nozzle changes can help monitor hot section wear and help catch damage before it becomes a costly repair.  

There are two types of fuel nozzles used in small turbine engines: simplex and duplex. Both use pressure to atomize or break the fuel into tiny particles. Simplex nozzles have only one orifice for the fuel to flow. The fuel nozzle tip contains an internal screen and distributor and an inherited trait to collect dirt and carbon. Duplex nozzles operate in the same manner as simplex nozzles except that they have two orifices instead of one. Because of the design of these nozzles, spray pattern streaking and drooling will occur when proper maintenance is not performed. Engine manufacturers recommend scheduled inspection, cleaning, replacement or overhaul. 



Digitalized prop stand test cell unit on premises.


Each completed engine undergoes a full operational check prior to shipment. Included are torque setting determinations with calibrated Lebow Equipment. Depending on the work scope, we are equipped to perform with our Computer-based Recompensation Equipment. These fine-line tests and setups ensure that each engine delivered to the customer meets the highest standards of performance in the field.