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14 CFR Ch. I (1–1–18 Edition) 

§ 125.225 

(b) Except as provided in paragraph 

(d) of this section, after October 11, 
1991, no person may operate a large air-
plane type certificated after September 
30, 1969, for operations above 25,000 feet 
altitude, nor a multiengine, turbine 
powered airplane type certificated 
after September 30, 1969, unless it is 
equipped with one or more approved 
flight recorders that utilize a digital 
method of recording and storing data 
and a method of readily retrieving that 
data from the storage medium. The fol-
lowing information must be able to be 
determined within the ranges, accura-
cies, resolutions, and recording inter-
vals specified in appendix D of this 
part: 

(1) Time; 
(2) Altitude; 
(3) Airspeed; 
(4) Vertical acceleration; 
(5) Heading; 
(6) Time of each radio transmission 

either to or from air traffic control; 

(7) Pitch attitude; 
(8) Roll attitude; 
(9) Longitudinal acceleration; 
(10) Pitch trim position; 
(11) Control column or pitch control 

surface position; 

(12) Control wheel or lateral control 

surface position; 

(13) Rudder pedal or yaw control sur-

face position; 

(14) Thrust of each engine; 
(15) Position of each trust reverser; 
(16) Trailing edge flap or cockpit flap 

control position; and 

(17) Leading edge flap or cockpit flap 

control position. 

(c) After October 11, 1991, no person 

may operate a large airplane equipped 
with a digital data bus and ARINC 717 
digital flight data acquisition unit 
(DFDAU) or equivalent unless it is 
equipped with one or more approved 
flight recorders that utilize a digital 
method of recording and storing data 
and a method of readily retrieving that 
data from the storage medium. Any pa-
rameters specified in appendix D of 
this part that are available on the dig-
ital data bus must be recorded within 
the ranges, accuracies, resolutions, and 
sampling intervals specified. 

(d) No person may operate under this 

part an airplane that is manufactured 
after October 11, 1991, unless it is 

equipped with one or more approved 
flight recorders that utilize a digital 
method of recording and storing data 
and a method of readily retrieving that 
data from the storage medium. The pa-
rameters specified in appendix D of 
this part must be recorded within the 
ranges, accuracies, resolutions and 
sampling intervals specified. For the 
purpose of this section, ‘‘manufac-
tured’’ means the point in time at 
which the airplane inspection accept-
ance records reflect that the airplane is 
complete and meets the FAA-approved 
type design data. 

(e) Whenever a flight recorder re-

quired by this section is installed, it 
must be operated continuously from 
the instant the airplane begins the 
takeoff roll until it has completed the 
landing roll at an airport. 

(f) Except as provided in paragraph 

(g) of this section, and except for re-
corded data erased as authorized in 
this paragraph, each certificate holder 
shall keep the recorded data prescribed 
in paragraph (a), (b), (c), or (d) of this 
section, as applicable, until the air-
plane has been operated for at least 25 
hours of the operating time specified in 
§ 125.227(a) of this chapter. A total of 1 
hour of recorded data may be erased for 
the purpose of testing the flight re-
corder or the flight recorder system. 
Any erasure made in accordance with 
this paragraph must be of the oldest re-
corded data accumulated at the time of 
testing. Except as provided in para-
graph (g) of this section, no record need 
be kept more than 60 days. 

(g) In the event of an accident or oc-

currence that requires immediate noti-
fication of the National Transportation 
Safety Board under 49 CFR part 830 and 
that results in termination of the 
flight, the certificate holder shall re-
move the recording media from the air-
plane and keep the recorded data re-
quired by paragraph (a), (b), (c), or (d) 
of this section, as applicable, for at 
least 60 days or for a longer period 
upon the request of the Board or the 
Administrator. 

(h) Each flight recorder required by 

this section must be installed in ac-
cordance with the requirements of 
§ 25.1459 of this chapter in effect on Au-
gust 31, 1977. The correlation required 
by § 25.1459(c) of this chapter need be 

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