462 

14 CFR Ch. I (1–1–24 Edition) 

§ 135.171 

(b)(1)(vi) of this section for specific 
components of the cabin interior that 
do not meet applicable flammability 
and smoke emission requirements, if 
the determination is made that special 
circumstances exist that make compli-
ance impractical. Such grants of devi-
ation will be limited to those airplanes 
manufactured within 1 year after the 
applicable date specified in this section 
and those airplanes in which the inte-
rior is replaced within 1 year of that 
date. A request for such grant of devi-
ation must include a thorough and ac-
curate analysis of each component sub-
ject to § 25.853(d) in effect March 6, 1995 
(formerly § 25.853(a–1) in effect on Au-
gust 20, 1986), the steps being taken to 
achieve compliance, and, for the few 
components for which timely compli-
ance will not be achieved, credible rea-
sons for such noncompliance. 

(viii) Contrary provisions of this sec-

tion notwithstanding, galley carts and 
standard galley containers that do not 
meet the flammability and smoke 
emission requirements of § 25.853(d) in 
effect March 6, 1995 (formerly § 25.853(a– 
1) in effect on August 20, 1986), may be 
used in airplanes that must meet the 
requirements of paragraph (b)(1)(i), 
(b)(1)(ii), (b)(1)(iv) or (b)(1)(vi) of this 
section provided the galley carts or 
standard containers were manufac-
tured prior to March 6, 1995. 

(2) For airplanes type certificated 

after January 1, 1958, seat cushions, ex-
cept those on flight crewmember seats, 
in any compartment occupied by crew 
or passengers must comply with the re-
quirements pertaining to fire protec-
tion of seat cushions in § 25.853(c) effec-
tive November 26, 1984. 

(c) Thermal/acoustic insulation ma-

terials. For transport category air-
planes type certificated after January 
1, 1958: 

(1) For airplanes manufactured before 

September 2, 2005, when thermal/acous-
tic insulation is installed in the fuse-
lage as replacements after September 
2, 2005, the insulation must meet the 
flame propagation requirements of 
§ 25.856 of this chapter, effective Sep-
tember 2, 2003, if it is: 

(i) Of a blanket construction, or 
(ii) Installed around air ducting. 
(2) For airplanes manufactured after 

September 2, 2005, thermal/acoustic in-

sulation materials installed in the fu-
selage must meet the flame propaga-
tion requirements of § 25.856 of this 
chapter, effective September 2, 2003. 

[Doc. No. 26192, 60 FR 6628, Feb. 2, 1995; Amdt. 
135–55, 60 FR 11194, Mar. 1, 1995; Amdt. 135–56, 
60 FR 13011, Mar. 9, 1995; Amdt. 135–90, 68 FR 
45084, July 31, 2003; Amdt. 135–103, 70 FR 
77752, Dec. 30, 2005; Docket FAA–2018–0119, 
Amdt. 135–139, 83 FR 9175, Mar. 5, 2018] 

§ 135.171 Shoulder harness installation 

at flight crewmember stations. 

(a) No person may operate a turbojet 

aircraft or an aircraft having a pas-
senger seating configuration, excluding 
any pilot seat, of 10 seats or more un-
less it is equipped with an approved 
shoulder harness installed for each 
flight crewmember station. 

(b) Each flight crewmember occu-

pying a station equipped with a shoul-
der harness must fasten the shoulder 
harness during takeoff and landing, ex-
cept that the shoulder harness may be 
unfastened if the crewmember cannot 
perform the required duties with the 
shoulder harness fastened. 

§ 135.173 Airborne thunderstorm de-

tection equipment requirements. 

(a) No person may operate an aircraft 

that has a passenger seating configura-
tion, excluding any pilot seat, of 10 
seats or more in passenger-carrying op-
erations, except a helicopter operating 
under day VFR conditions, unless the 
aircraft is equipped with either ap-
proved thunderstorm detection equip-
ment or approved airborne weather 
radar equipment. 

(b) No person may operate a heli-

copter that has a passenger seating 
configuration, excluding any pilot seat, 
of 10 seats or more in passenger-car-
rying operations, under night VFR 
when current weather reports indicate 
that thunderstorms or other poten-
tially hazardous weather conditions 
that can be detected with airborne 
thunderstorm detection equipment 
may reasonably be expected along the 
route to be flown, unless the helicopter 
is equipped with either approved thun-
derstorm detection equipment or ap-
proved airborne weather radar equip-
ment. 

(c) No person may begin a flight 

under IFR or night VFR conditions 

463 

Federal Aviation Administration, DOT 

§ 135.177 

when current weather reports indicate 
that thunderstorms or other poten-
tially hazardous weather conditions 
that can be detected with airborne 
thunderstorm detection equipment, re-
quired by paragraph (a) or (b) of this 
section, may reasonably be expected 
along the route to be flown, unless the 
airborne thunderstorm detection equip-
ment is in satisfactory operating con-
dition. 

(d) If the airborne thunderstorm de-

tection equipment becomes inoperative 
en route, the aircraft must be operated 
under the instructions and procedures 
specified for that event in the manual 
required by § 135.21. 

(e) This section does not apply to air-

craft used solely within the State of 
Hawaii, within the State of Alaska, 
within that part of Canada west of lon-
gitude 130 degrees W, between latitude 
70 degrees N, and latitude 53 degrees N, 
or during any training, test, or ferry 
flight. 

(f) Without regard to any other provi-

sion of this part, an alternate elec-
trical power supply is not required for 
airborne thunderstorm detection equip-
ment. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–20, 51 FR 40710, Nov. 7, 
1986; Amdt. 135–60, 61 FR 2616, Jan. 26, 1996] 

§ 135.175 Airborne weather radar 

equipment requirements. 

(a) No person may operate a large, 

transport category aircraft in pas-
senger-carrying operations unless ap-
proved airborne weather radar equip-
ment is installed in the aircraft. 

(b) No person may begin a flight 

under IFR or night VFR conditions 
when current weather reports indicate 
that thunderstorms, or other poten-
tially hazardous weather conditions 
that can be detected with airborne 
weather radar equipment, may reason-
ably be expected along the route to be 
flown, unless the airborne weather 
radar equipment required by paragraph 
(a) of this section is in satisfactory op-
erating condition. 

(c) If the airborne weather radar 

equipment becomes inoperative en 
route, the aircraft must be operated 
under the instructions and procedures 
specified for that event in the manual 
required by § 135.21. 

(d) This section does not apply to air-

craft used solely within the State of 
Hawaii, within the State of Alaska, 
within that part of Canada west of lon-
gitude 130 degrees W, between latitude 
70 degrees N, and latitude 53 degrees N, 
or during any training, test, or ferry 
flight. 

(e) Without regard to any other pro-

vision of this part, an alternate elec-
trical power supply is not required for 
airborne weather radar equipment. 

§ 135.177 Emergency equipment re-

quirements for aircraft having a 

passenger seating configuration of 

more than 19 passengers. 

(a) No person may operate an aircraft 

having a passenger seating configura-
tion, excluding any pilot seat, of more 
than 19 seats unless it is equipped with 
the following emergency equipment: 

(1) At least one approved first-aid kit 

for treatment of injuries likely to 
occur in flight or in a minor accident 
that must: 

(i) Be readily accessible to crew-

members. 

(ii) Be stored securely and kept free 

from dust, moisture, and damaging 
temperatures. 

(iii) Contain at least the following 

appropriately maintained contents in 
the specified quantities: 

Contents 

Quantity 

Adhesive bandage compresses, 1-inch .................

16 

Antiseptic swabs .....................................................

20 

Ammonia inhalants .................................................

10 

Bandage compresses, 4-inch .................................

8 

Triangular bandage compresses, 40-inch ..............

5 

Arm splint, noninflatable .........................................

1 

Leg splint, noninflatable ..........................................

1 

Roller bandage, 4-inch ...........................................

4 

Adhesive tape, 1-inch standard roll ........................

2 

Bandage scissors ...................................................

1 

Protective nonpermeable gloves or equivalent ......

1 pair 

(2) A crash axe carried so as to be ac-

cessible to the crew but inaccessible to 
passengers during normal operations. 

(3) Signs that are visible to all occu-

pants to notify them when smoking is 
prohibited and when safety belts must 
be fastened. The signs must be con-
structed so that they can be turned on 
during any movement of the aircraft 
on the surface, for each takeoff or land-
ing, and at other times considered nec-
essary by the pilot in command. ‘‘No 
smoking’’ signs shall be turned on 
when required by § 135.127.