Honeywell HTF7000

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LV-BSS CL30 (9537273741) (cropped).jpg
installed on a Bombardier Challenger 300
Type Turbofan
National origin United States
Manufacturer Honeywell Aerospace
First run 1999[1]
Major applications Bombardier Challenger 300/350
Gulfstream G280
Embraer Legacy 500/450
Number built 1400[2]

The Honeywell HTF7000 is a turbofan engine produced by Honeywell Aerospace. Rated in the 6,540–7,624 pounds-force (29.09–33.91 kN) range, the HTF7000 is used on the Bombardier Challenger 300/350, Gulfstream G280 and Embraer Legacy 500/450 and is planned for the new Cessna Citation Longitude.

The engine was originally designated the AS907 which was changed in 2004 to HTF7000, the AS907 designation is still used for legal and regulatory use.[3]

In October 2016, 2.6 million hr have been logged by 1,400 in service engines and it has a 99.9% dispatch reliability rate, Borescope inspections extends time between overhaul and some engines have remained installed for up to 10,000 hr. Average fuel consumption is about 950 lb. per hour for a 7,765 lbf engine on a G280, to be compared to 875 lb. per hour for a 4,420 lbf TFE731 on a G150. Its architecture could be extended for a range of 8,000 to 10,000 lbf thrust.[2] Honeywell maintenance program is $447 for two engines per hour.[4]


HTF7000 / AS907
6,826 lbf (30.36 kN) original variant of the engine. Developed for the Bombardier Challenger 300.
Higher thrust variant of the AS907, designed at the same time, intended to power BAE System's Avro RJX.[5] The aircraft was cancelled after 3 airframes were built and flown and subsequently this engine variant never entered full production.
7,624 lbf (33.91 kN) variant developed for use on the Gulfstream G280[6]
7,323 lbf (32.57 kN) Variant developed for use on the Bombardier Challenger 350.
6,540–7,036 lbf (29.09–31.30 kN) variant developed for the Embraer Legacy 500/450 business jets.[7]
7,550 lbf (33.6 kN) for the Cessna Citation Longitude[8]



Data from FAA[9]

General characteristics

  • Type: Turbofan
  • Length: 92.4 in (234.7 cm)[10]
  • Diameter: 34.2 in (87 cm) Fan[11]
  • Dry weight: 1,514–1,534 lb (687–696 kg)


  • Compressor: 21 internally reinforced blades fan,[2] 16:1 compression ratio HP: four stage axial + one stage centrifugal[12]
  • Combustors: annular combustor
  • Turbine: two stage HP turbine, three stage LP turbine
  • Oil system: pressure spray with scavenge and dry sump[verification needed]


See also[edit]

Related development
Comparable engines
Related lists


  1. ^ "AlliedSignal powers up AS900 turbofan". Flight Global. 18 August 1999. 
  2. ^ a b c d David Esler (Oct 27, 2016). "Honeywell’s Super-Midsize HTF7000 Engine". Business & Commercial Aviation. Aviation Week. 
  3. ^ "Honeywell gives AS907 turbofan redesignation". Flight International. 13 January 2004. 
  4. ^ Fred George (Nov 1, 2014). "Pilot Report: Bombardier Challenger 350". Business & Commercial Aviation. Aviation Week. 
  5. ^ Paul Lowe (April 23, 2008). "Honeywell’s AS907 gets nod, production begins". Aviation International News. 
  6. ^ "G280 Specifications" (PDF). Gulfstream. 2015. 
  7. ^ Guy Norris (24 May 2010). "Embraer’s Legacy 450/500 Engine Enters Test At Honeywell.". Aviation Week & Space Technology. 
  8. ^ "Cessna showcases new Citation Longitude at NBAA 2015; announces large cabin Citation Hemisphere" (Press release). Textron Aviation. 16 November 2015. 
  9. ^ "AS907 Type Certificate Data Sheet, Revision 7" (PDF). FAA. 22 March 2016. 
  10. ^ "Honeywell HTF7000". Flug Revue. 18 April 2013. 
  11. ^ a b c "NBAA 2006: Engine giants power up for growth". Flight Global. 17 October 2006. 
  12. ^ Fred George (Feb 25, 2016). "Honeywell HTF7700L Turbofans". Business & Commercial Aviation. Aviation Week. 

External links[edit]