where is the difference?
with perf. 2e you don't have a TDP/LDP ??
NPA-OPS 38 to JAR-OPS 3 introduces the concept of Performance Class 2e for offshore helideck operations in a hostile environment. This level of performance provides for zero exposure engine failure accountability in the event of an engine failure at any time during flight, including takeoff and landing, thereby increasing the chances of avoiding a forced water landing.
Performance 1 JAR-OPS:
(3) For Elevated Heliports and
Helidecks the take-off mass does not exceed
the maximum take-off mass specified in the
Helicopter Flight Manual for the take-off
procedure being used and is such that the
helicopter is capable of:
(i) In the event of a critical power
unit failure being recognised at or before
the take-off decision point TDP, rejecting
the take-off and landing on the elevated
heliport or helideck; and
(ii) In the event of a critical power
unit failure being recognised at or after
TDP, continuing the take-off, clearing the
elevated heliport or helideck and
thereafter clearing all obstacles under the
flight path of the helicopter by a vertical
margin of at least 35 ft up to the end of
the take-off distance required. Obstacle
clearance margins in excess of 35 ft may
be specified by the Authority at a
particular heliport.