140 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.355 

§ 121.355

Equipment for operations on 

which specialized means of naviga-
tion are used. 

(a) No certificate holder may conduct 

an operation— 

(1) Using Doppler Radar or an Iner-

tial Navigation System outside the 48 
contiguous States and the District of 
Columbia, unless such systems have 
been approved in accordance with ap-
pendix G to this part; or 

(2) Using Doppler Radar or an Iner-

tial Navigation System within the 48 
contiguous States and the District of 
Columbia, or any other specialized 
means of navigation, unless it shows 
that an adequate airborne system is 
provided for the specialized navigation 
authorized for the particular operation. 

(b) Notwithstanding paragraph (a) of 

this section, Doppler Radar and Iner-
tial Navigation Systems, and the train-
ing programs, maintenance programs, 
relevant operations manual material, 
and minimum equipment lists prepared 
in accordance therewith, approved be-
fore April 29, 1972, are not required to 
be approved in accordance with that 
paragraph. 

[Doc. No. 10204, 37 FR 6464, Mar. 30, 1972] 

§ 121.356

Collision avoidance system. 

Effective January 1, 2005, any air-

plane you operate under this part must 
be equipped and operated according to 
the following table: 

C

OLLISION

A

VOIDANCE

S

YSTEMS

 

If you operate any— 

Then you must operate that airplane 

with— 

(a) Turbine-powered 

airplane of more 
than 33,000 
pounds maximum 
certificated take-
off weight.

(1) An appropriate class of Mode S 

transponder that meets Technical 
Standard Order (TSO) C–112, or a 
later version, and one of the fol-
lowing approved units: 

(i) TCAS II that meets TSO C–119b 

(version 7.0), or takeoff weight a 
later version. 

(ii) TCAS II that meets TSO C–119a 

(version 6.04A Enhanced) that was 
installed in that airplane before May 
1, 2003. If that TCAS II version 
6.04A Enhanced no longer can be 
repaired to TSO C–119a standards, 
it must be replaced with a TCAS II 
that meets TSO C–119b (version 
7.0), or a later version. 

(iii) A collision avoidance system equiv-

alent to TSO C–119b (version 7.0), 
or a later version, capable of coordi-
nating with units that meet TSO C– 
119a (version 6.04A Enhanced), or a 
later version. 

C

OLLISION

A

VOIDANCE

S

YSTEMS

—Continued 

If you operate any— 

Then you must operate that airplane 

with— 

(b) Passenger or 

combination 
cargo/passenger 
(combi) airplane 
that has a pas-
senger seat con-
figuration of 10– 
30 seats.

(1) TCAS I that meets TSO C–118, or 

a later version, or 

(2) A collision avoidance system equiv-

alent to has a TSO C–118, or a later 
version, or 

(3) A collision avoidance system and 

Mode S transponder that meet para-
graph (a)(1) of this section. 

(c) Piston-powered 

airplane of more 
than 33,000 
pounds maximum 
certificated take-
off weight.

(1) TCAS I that meets TSO C–118, or 

a later version, or 

(2) A collision avoidance system equiv-

alent to maximum TSO C–118, or a 
later version, or 

(3) A collision avoidance system and 

Mode S transponder that meet para-
graph (a)(1) of this section. 

[Doc. No. FAA–2001–10910, 68 FR 15902, Apr. 1, 
2003] 

§ 121.357

Airborne weather radar 

equipment requirements. 

(a) No person may operate any trans-

port category airplane (except C–46 
type airplanes) or a nontransport cat-
egory airplane certificated after De-
cember 31, 1964, unless approved air-
borne weather radar equipment has 
been installed in the airplane. 

(b) [Reserved] 
(c) Each person operating an airplane 

required to have approved airborne 
weather radar equipment installed 
shall, when using it under this part, op-
erate it in accordance with the fol-
lowing: 

(1) 

Dispatch. 

No person may dispatch 

an airplane (or begin the flight of an 
airplane in the case of a certificate 
holder, that does not use a dispatch 
system) under IFR or night VFR condi-
tions when current weather reports in-
dicate that thunderstorms, or other po-
tentially hazardous weather conditions 
that can be detected with airborne 
weather radar, may reasonably be ex-
pected along the route to be flown, un-
less the airborne weather radar equip-
ment is in satisfactory operating con-
dition. 

(2) If the airborne weather radar be-

comes inoperative en route, the air-
plane must be operated in accordance 
with the approved instructions and 
procedures specified in the operations 
manual for such an event. 

(d) This section does not apply to air-

planes used solely within the State of 
Hawaii or within the State of Alaska 

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