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A Performance Class 1 (PC 1) or 2 (PC2) helicopter must be capable of the following OEI performance when en-route in the cruise:
  • A
    50 ft/min rate of climb at 2 000 ft above mountainous terrain, clear of obstacles within 5 NM either side of track, when VFR.
  • B
    35 ft/min rate of climb at 1 000 ft above mountainous terrain, clear of obstacles within 900 m either side of track, when IFR.
  • C
    50 ft/min rate of climb at 2 000 ft above mountainous terrain, clear of obstacles within 5 NM either side of track, when IFR.
  • D
    35 ft/min rate of climb at 1 000 ft above mountainous terrain, clear of obstacles within 900 m either side of track, when VFR.

Refer to figure.
An operator shall ensure that en-route flight path with the critical engine inoperative, appropriate to the meteorological conditions expected for the flight, complies with at least one of the following requirements at all points along the route. Driftdown techniques may be used.

1. According to CAT.POL.H.215 (PC 1) - En-route – Critical Engine Inoperative:

  • The mass of the helicopter and flight path at all points along the route, with the critical engine inoperative and the meteorological conditions expected for the flight, should such that:

When it is intended that the flight will be conducted at any time out of sight of the surface, the mass of the helicopter permits a rate of climb of at least 50 ft/minute with the critical engine inoperative at an altitude of at least 300 m (1 000 ft), or 600 m (2 000 ft) in areas of mountainous terrain, above all terrain and obstacles along the route within 9,3 km (5 NM) on either side of the intended track.

2. According to CAT.POL.H.320 (PC 2) - En-route – Critical Engine Inoperative:

  • The requirement of CAT.POL.H.215 shall be complied with (as described above).

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