Federal Aviation Administration, DOT

Section 121.195

(b) Aircraft certificated after September
30, 1958, but before August 30, 1959 (SR
422A). No person may operate a turbine
engine powered airplane along an intended route unless he complies with
either of the following:
(1) There is no place along the intended track that is more than 90 minutes (with all engines operating at
cruising power) from an airport that
meets the requirements of Section 121.197.
(2) Its weight, according to the twoengine-inoperative, en route, net flight
path data in the Airplane Flight Manual, allows the airplane to fly from the
point where the two engines are assumed to fail simultaneously to an airport that meets the requirements of
Section 121.197, with a net flight path (considering the ambient temperatures anticipated along the track) having a positive slope at an altitude of at least
1,000 feet above all terrain and obstructions within 5 miles on each side of the
intended track, or at an altitude of
2,000 feet, whichever is higher.

sidering the ambient temperatures anticipated along the track) clearing
vertically by at least 2,000 feet all terrain and obstructions within five statute miles (4.34 nautical miles) on each
side of the intended track. For the purposes of this subparagraph, it is assumed that - 
(i) The two engines fail at the most
critical point en route;
(ii) The net flight path has a positive
slope at 1,500 feet above the airport
where the landing is assumed to be
made after the engines fail;
(iii) Fuel jettisoning will be approved
if the certificate holder shows that the
crew is properly instructed, that the
training program is adequate, and that
all other precautions are taken to ensure a safe procedure;
(iv) The airplane-s weight at the
point where the two engines are assumed to fail provides enough fuel to
continue to the airport, to arrive at an
altitude of at least 1,500 feet directly
over the airport, and thereafter to fly
for 15 minutes at cruise power or
thrust, or both; and
(v) The consumption of fuel and oil
after the engine failure is the same as
the consumption that is allowed for in
the net flight path data in the Airplane
Flight Manual.

For the purposes of paragraph (b)(2) of
this section, it is assumed that the two
engines fail at the most critical point
en route, that the airplane-s weight at
the point where the engines fail includes enough fuel to continue to the
airport, to arrive at an altitude of at
least 1,500 feet directly over the airport, and thereafter to fly for 15 minutes at cruise power or thrust, or both,
and that the consumption of fuel and
oil after engine failure is the same as
the consumption allowed for in the net
flight path data in the Airplane Flight
Manual.
(c) Aircraft certificated after August 29,
1959 (SR 422B). No person may operate
a turbine engine powered airplane
along an intended route unless he complies with either of the following:
(1) There is no place along the intended track that is more than 90 minutes (with all engines operating at
cruising power) from an airport that
meets the requirements of Section 121.197.
(2) Its weight, according to the twoengine inoperative, en route, net flight
path data in the Airplane Flight Manual, allows the airplane to fly from the
point where the two engines are assumed to fail simultaneously to an airport that meets the requirements of
Section 121.197, with the net flight path (con-

Section 121.195 Airplanes: Turbine engine
powered: Landing limitations: Destination airports.
(a) No person operating a turbine engine powered airplane may take off
that airplane at such a weight that (allowing for normal consumption of fuel
and oil in flight to the destination or
alternate airport) the weight of the airplane on arrival would exceed the landing weight set forth in the Airplane
Flight Manual for the elevation of the
destination or alternate airport and
the ambient temperature anticipated
at the time of landing.
(b) Except as provided in paragraph
(c), (d), or (e) of this section, no person
operating a turbine engine powered airplane may take off that airplane unless
its weight on arrival, allowing for normal consumption of fuel and oil in
flight (in accordance with the landing
distance set forth in the Airplane
Flight Manual for the elevation of the

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