611 

Federal Aviation Administration, DOT 

§ 29.785 

the following movements and actu-
ation: 

(a) Flight controls, including the col-

lective pitch control, must operate 
with a sense of motion which cor-
responds to the effect on the rotor-
craft. 

(b) Twist-grip engine power controls 

must be designed so that, for lefthand 
operation, the motion of the pilot’s 
hand is clockwise to increase power 
when the hand is viewed from the edge 
containing the index finger. Other en-
gine power controls, excluding the col-
lective control, must operate with a 
forward motion to increase power. 

(c) Normal landing gear controls 

must operate downward to extend the 
landing gear. 

[Amdt. 29–24, 49 FR 44437, Nov. 6, 1984] 

§ 29.783

Doors. 

(a) Each closed cabin must have at 

least one adequate and easily acces-
sible external door. 

(b) Each external door must be lo-

cated, and appropriate operating proce-
dures must be established, to ensure 
that persons using the door will not be 
endangered by the rotors, propellers, 
engine intakes, and exhausts when the 
operating procedures are used. 

(c) There must be means for locking 

crew and external passenger doors and 
for preventing their opening in flight 
inadvertently or as a result of mechan-
ical failure. It must be possible to open 
external doors from inside and outside 
the cabin with the rotorcraft on the 
ground even though persons may be 
crowded against the door on the inside 
of the rotorcraft. The means of opening 
must be simple and obvious and so ar-
ranged and marked that it can be read-
ily located and operated. 

(d) There must be reasonable provi-

sions to prevent the jamming of any 
external doors in a minor crash as a re-
sult of fuselage deformation under the 
following ultimate inertial forces ex-
cept for cargo or service doors not suit-
able for use as an exit in an emergency: 

(1) Upward—1.5g. 
(2) Forward—4.0g. 
(3) Sideward—2.0g. 
(4) Downward—4.0g. 
(e) There must be means for direct 

visual inspection of the locking mecha-
nism by crewmembers to determine 

whether the external doors (including 
passenger, crew, service, and cargo 
doors) are fully locked. There must be 
visual means to signal to appropriate 
crewmembers when normally used ex-
ternal doors are closed and fully 
locked. 

(f) For outward opening external 

doors usable for entrance or egress, 
there must be an auxiliary safety 
latching device to prevent the door 
from opening when the primary latch-
ing mechanism fails. If the door does 
not meet the requirements of para-
graph (c) of this section with this de-
vice in place, suitable operating proce-
dures must be established to prevent 
the use of the device during takeoff and 
landing. 

(g) If an integral stair is installed in 

a passenger entry door that is qualified 
as a passenger emergency exit, the 
stair must be designed so that under 
the following conditions the effective-
ness of passenger emergency egress will 
not be impaired: 

(1) The door, integral stair, and oper-

ating mechanism have been subjected 
to the inertial forces specified in para-
graph (d) of this section, acting sepa-
rately relative to the surrounding 
structure. 

(2) The rotorcraft is in the normal 

ground attitude and in each of the atti-
tudes corresponding to collapse of one 
or more legs, or primary members, as 
applicable, of the landing gear. 

(h) Nonjettisonable doors used as 

ditching emergency exits must have 
means to enable them to be secured in 
the open position and remain secure for 
emergency egress in sea state condi-
tions prescribed for ditching. 

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as 
amended by Amdt. 29–20, 45 FR 60178, Sept. 
11, 1980; Amdt. 29–29, 54 FR 47320, Nov. 13, 
1989; Amdt. 27–26, 55 FR 8003, Mar. 6, 1990; 
Amdt. 29–31, 55 FR 38966, Sept. 21, 1990] 

§ 29.785

Seats, berths, litters, safety 

belts, and harnesses. 

(a) Each seat, safety belt, harness, 

and adjacent part of the rotorcraft at 
each station designated for occupancy 
during takeoff and landing must be free 
of potentially injurious objects, sharp 
edges, protuberances, and hard surfaces 
and must be designed so that a person 
making proper use of these facilities 

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