258
14 CFR Ch. I (1–1–19 Edition)
Pt. 121, App. C
[Doc. No. 25530, 53 FR 26147, July 11, 1988; 53 FR 30906, Aug. 16, 1988]
A
PPENDIX
C
TO
P
ART
121—C–46
N
ONTRANSPORT
C
ATEGORY
A
IRPLANES
Cargo Operations
1.
Required engines.
(a) Except as provided
in paragraph (b) of this section, the engines
specified in subparagraphs (1) or (2) of this
section must be installed in C–46 non-
transport category airplanes operated at
gross weights exceeding 45,000 pounds:
(1) Pratt and Whitney R2800–51–M1 or
R2800–75–M1 engines (engines converted from
basic model R2800–51 or R2800–75 engines in
accordance with FAA approved data) that—
(i) Conform to Engine Specification 5E–8;
(ii) Conform to the applicable portions of
the operator’s manual;
(iii) Comply with all the applicable air-
worthiness directives; and
(iv) Are equipped with high capacity oil
pump drive gears in accordance with FAA
approved data.
(2) Other engines found acceptable by the
Flight Standards office having type certifi-
cation responsibility for the C–46 airplane.
(b) Upon application by an operator con-
ducting cargo operations with nontransport
category C–46 airplanes between points with-
in the State of Alaska, the responsible
Flight Standards office may authorize the
operation of such airplanes, between points
within the State of Alaska; without compli-
ance with paragraph (a) of this section if the
operator shows that, in its area of operation,
installation of the modified engines is not
necessary to provide adequate cooling for
single-engine operations. Such authorization
and any conditions or limitations therefor is
made a part of the Operations Specifications
of the operator.
2.
Minimum acceptable means of complying
with the special airworthiness requirements.
Unless otherwise authorized under § 121.213,
the data set forth in sections 3 through 34 of
this appendix, as correlated to the C–46 non-
transport category airplane, is the minimum
means of compliance with the special air-
worthiness requirements of §§ 121.215 through
121.281.
3.
Susceptibility of material to fire.
[Deleted
as unnecessary]
4.
Cabin interiors.
C–46 crew compartments
must meet all the requirements of § 121.215,
and, as required in § 121.221, the door between
the crew compartment and main cabin
(cargo) compartment must be flame resist-
ant.
5.
Internal doors.
Internal doors, including
the crew to main cabin door, must meet all
the requirements of § 121.217.
6.
Ventilation.
Standard C–46 crew compart-
ments meet the ventilation requirements of
§ 121.219 if a means of ventilation for control-
ling the flow of air is available between the
crew compartment and main cabin. The ven-
tilation requirement may be met by use of a
door between the crew compartment and
main cabin. The door need not have louvers
installed; however, if louvers are installed,
they must be controllable.
7.
Fire precautions.
Compliance is required
with all the provisions of § 121.221.
(a) In establishing compliance with this
section, the C–46 main cabin is considered as
a Class A compartment if—
(1) The operator utilizes a standard system
of cargo loading and tiedown that allows
easy access in flight to all cargo in such
compartment, and, such system is included
in the appropriate portion of the operator’s
manual; and
(2) A cargo barrier is installed in the for-
ward end of the main cabin cargo compart-
ment. The barrier must—
(i) Establish the most forward location be-
yond which cargo cannot be carried;
(ii) Protect the components and systems of
the airplane that are essential to its safe op-
eration from cargo damage; and
(iii) Permit easy access, in flight, to cargo
in the main cabin cargo compartment.
The barrier may be a cargo net or a network
of steel cables or other means acceptable to
the Administrator which would provide
equivalent protection to that of a cargo net.
The barrier need not meet crash load re-
quirements of FAR § 25.561; however, it must
be attached to the cargo retention fittings
and provide the degree of cargo retention
that is required by the operators’ standard
system of cargo loading and tiedown.
(b) C–46 forward and aft baggage compart-
ments must meet, as a minimum, Class B re-
quirements of this section or be placarded in
a manner to preclude their use as cargo or
baggage compartments.
8.
Proof of compliance.
The demonstration
of compliance required by § 121.223 is not re-
quired for C–46 airplanes in which—
(1) The main cabin conforms to Class A
cargo compartment requirements of § 121.219;
and
(2) Forward and aft baggage compartments
conform to Class B requirements of § 121.221,
or are placarded to preclude their use as
cargo or baggage compartments.
9.
Propeller deicing fluid.
No change from
the requirements of § 121.225. Isopropyl alco-
hol is a combustible fluid within the mean-
ing of this section.
10.
Pressure cross-feed arrangements, location
of fuel tanks, and fuel system lines and fittings.
C–46 fuel systems which conform to all appli-
cable Curtiss design specifications and which
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