747 

Federal Aviation Administration, DOT 

§ 91.207 

(5) Gyroscopic pitch and bank indi-

cator (artificial horizon); 

(6) Generator or alternator of ade-

quate capacity for the required instru-
ments and equipment; and 

(7) Radar altimeter. 
(i) 

Exclusions. 

Paragraphs (f) and (g) 

of this section do not apply to oper-
ations conducted by a holder of a cer-
tificate issued under part 121 or part 
135 of this chapter. 

[Doc. No. 18334, 54 FR 34292, Aug. 18, 1989, as 
amended by Amdt. 91–220, 55 FR 43310, Oct. 
26, 1990; Amdt. 91–223, 56 FR 41052, Aug. 16, 
1991; Amdt. 91–231, 57 FR 42672, Sept. 15, 1992; 
Amdt. 91–248, 61 FR 5171, Feb. 9, 1996; Amdt. 
91–251, 61 FR 34560, July 2, 1996; Amdt. 91–285, 
69 FR 77599, Dec. 27, 2004; Amdt. 91–296, 72 FR 
31679, June 7, 2007; Amdt. 91–309, 74 FR 42563, 
Aug. 21, 2009; Docket FAA–2015–1621, Amdt. 
91–346, 81 FR 96700, Dec. 30, 2016] 

§ 91.207

Emergency locator transmit-

ters. 

(a) Except as provided in paragraphs 

(e) and (f) of this section, no person 
may operate a U.S.-registered civil air-
plane unless— 

(1) There is attached to the airplane 

an approved automatic type emergency 
locator transmitter that is in operable 
condition for the following operations, 
except that after June 21, 1995, an 
emergency locator transmitter that 
meets the requirements of TSO-C91 
may not be used for new installations: 

(i) Those operations governed by the 

supplemental air carrier and commer-
cial operator rules of parts 121 and 125; 

(ii) Charter flights governed by the 

domestic and flag air carrier rules of 
part 121 of this chapter; and 

(iii) Operations governed by part 135 

of this chapter; or 

(2) For operations other than those 

specified in paragraph (a)(1) of this sec-
tion, there must be attached to the air-
plane an approved personal type or an 
approved automatic type emergency 
locator transmitter that is in operable 
condition, except that after June 21, 
1995, an emergency locator transmitter 
that meets the requirements of TSO- 
C91 may not be used for new installa-
tions. 

(b) Each emergency locator trans-

mitter required by paragraph (a) of this 
section must be attached to the air-
plane in such a manner that the prob-
ability of damage to the transmitter in 

the event of crash impact is minimized. 
Fixed and deployable automatic type 
transmitters must be attached to the 
airplane as far aft as practicable. 

(c) Batteries used in the emergency 

locator transmitters required by para-
graphs (a) and (b) of this section must 
be replaced (or recharged, if the bat-
teries are rechargeable)— 

(1) When the transmitter has been in 

use for more than 1 cumulative hour; 
or 

(2) When 50 percent of their useful 

life (or, for rechargeable batteries, 50 
percent of their useful life of charge) 
has expired, as established by the 
transmitter manufacturer under its ap-
proval. 

The new expiration date for replacing 
(or recharging) the battery must be 
legibly marked on the outside of the 
transmitter and entered in the aircraft 
maintenance record. Paragraph (c)(2) 
of this section does not apply to bat-
teries (such as water-activated bat-
teries) that are essentially unaffected 
during probable storage intervals. 

(d) Each emergency locator trans-

mitter required by paragraph (a) of this 
section must be inspected within 12 
calendar months after the last inspec-
tion for— 

(1) Proper installation; 
(2) Battery corrosion; 
(3) Operation of the controls and 

crash sensor; and 

(4) The presence of a sufficient signal 

radiated from its antenna. 

(e) Notwithstanding paragraph (a) of 

this section, a person may— 

(1) Ferry a newly acquired airplane 

from the place where possession of it 
was taken to a place where the emer-
gency locator transmitter is to be in-
stalled; and 

(2) Ferry an airplane with an inoper-

ative emergency locator transmitter 
from a place where repairs or replace-
ments cannot be made to a place where 
they can be made. 

No person other than required crew-
members may be carried aboard an air-
plane being ferried under paragraph (e) 
of this section. 

(f) Paragraph (a) of this section does 

not apply to— 

(1) Before January 1, 2004, turbojet- 

powered aircraft; 

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