500
14 CFR Ch. I (1–1–24 Edition)
§ 135.369
(2) If the critical engine fails at any
time after the airplane reaches crit-
ical-engine failure speed V
1
, to con-
tinue the takeoff and reach a height of
50 feet, as indicated by the takeoff path
data, before passing over the end of the
runway; and
(3) To clear all obstacles either by at
least 50 feet vertically (as shown by the
takeoff path data) or 200 feet hori-
zontally within the airport boundaries
and 300 feet horizontally beyond the
boundaries, without banking before
reaching a height of 50 feet (as shown
by the takeoff path data) and after
that without banking more than 15 de-
grees.
(b) In applying this section, correc-
tions must be made for any runway
gradient. To allow for wind effect,
takeoff data based on still air may be
corrected by taking into account not
more than 50 percent of any reported
headwind component and not less than
150 percent of any reported tailwind
component.
§ 135.369 Large transport category air-
planes: Reciprocating engine pow-
ered: En route limitations: All en-
gines operating.
(a) No person operating a recipro-
cating engine powered large transport
category airplane may take off that
airplane at a weight, allowing for nor-
mal consumption of fuel and oil, that
does not allow a rate of climb (in feet
per minute), with all engines oper-
ating, of at least 6.90 Vs
o
(that is, the
number of feet per minute obtained by
multiplying the number of knots by
6.90) at an altitude of a least 1,000 feet
above the highest ground or obstruc-
tion within ten miles of each side of
the intended track.
(b) This section does not apply to
large transport category airplanes cer-
tificated under part 4a of the Civil Air
Regulations.
§ 135.371 Large transport category air-
planes: Reciprocating engine pow-
ered: En route limitations: One en-
gine inoperative.
(a) Except as provided in paragraph
(b) of this section, no person operating
a reciprocating engine powered large
transport category airplane may take
off that airplane at a weight, allowing
for normal consumption of fuel and oil,
that does not allow a rate of climb (in
feet per minute), with one engine inop-
erative, of at least (0.079
¥
0.106/N) Vs
o
2
(where N is the number of engines in-
stalled and Vs
o
is expressed in knots)
at an altitude of least 1,000 feet above
the highest ground or obstruction
within 10 miles of each side of the in-
tended track. However, for the pur-
poses of this paragraph the rate of
climb for transport category airplanes
certificated under part 4a of the Civil
Air Regulations is 0.026 Vs
o
2.
(b) In place of the requirements of
paragraph (a) of this section, a person
may, under an approved procedure, op-
erate a reciprocating engine powered
large transport category airplane at an
all-engines-operating altitude that al-
lows the airplane to continue, after an
engine failure, to an alternate airport
where a landing can be made under
§ 135.377, allowing for normal consump-
tion of fuel and oil. After the assumed
failure, the flight path must clear the
ground and any obstruction within five
miles on each side of the intended
track by at least 2,000 feet.
(c) If an approved procedure under
paragraph (b) of this section is used,
the certificate holder shall comply
with the following:
(1) The rate of climb (as prescribed in
the Airplane Flight Manual for the ap-
propriate weight and altitude) used in
calculating the airplane’s flight path
shall be diminished by an amount in
feet per minute, equal to (0.079
¥
0.106/
N) Vs
o
2 (when N is the number of en-
gines installed and Vs
o
is expressed in
knots) for airplanes certificated under
part 25 of this chapter and by 0.026 Vs
o
2
for airplanes certificated under part 4a
of the Civil Air Regulations.
(2) The all-engines-operating altitude
shall be sufficient so that in the event
the critical engine becomes inoperative
at any point along the route, the flight
will be able to proceed to a predeter-
mined alternate airport by use of this
procedure. In determining the takeoff
weight, the airplane is assumed to pass
over the critical obstruction following
engine failure at a point no closer to
the critical obstruction than the near-
est approved navigational fix, unless
the Administrator approves a proce-
dure established on a different basis