| The AS-355F-2 Ecureuil II featured an upgraded transmission and an increase in gross weight.
Heli-Lynx Helicopter Services, Inc. in Stoney Creek, Ontario has an STC to retrofit Rolls-Royce 250-C20R engines on this airframe for overall increased performance. If their other modification, the "355FX Systems" STC (mainly a re-engineered electrical system) is done to the airframe along with the Rolls-Royce 250-C20R retrofits, the modification name is 355FX3. If the modification is done without the retrofits, it's name is 355FX2.
Starflex, LLC acquired an STC in 2006 from American Eurocopter, LLC to retrofit Rolls-Royce 250-C20R engines to this model as part of an upgrade marketed as the "AS355 F2R" performance package.
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| Manufacturer : Aerospatiale | | Years Built : 1985 - 1998 | | Serial # Range : - | | Weight Class/Type : Light - Helicopter |
| | Engines : 250-C20F, 250-C20R, 250-C20R+ | | Number Of : 2 | TBO : 3,500 | HSI : 0 | | Shaft : 420 | Thrust : 0 |
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