Section 135.152

14 CFR Ch. I (1-1-19 Edition)

SectionSection 23.1459, 25.1459, 27.1459, or 29.1459 of
this chapter, as appropriate, need be
established only on one aircraft of a
group of aircraft:
(i) That are of the same type;
(ii) On which the flight recorder models and their installations are the
same; and
(iii) On which there are no differences in the type designs with respect to the installation of the first pilot-s instruments associated with the
flight recorder. The most recent instrument calibration, including the recording medium from which this calibration is derived, and the recorder correlation must be retained by the certificate holder.
(2) For airplanes manufactured after
August 18, 2000, each flight data recorder system required by this section
must be installed in accordance with
the requirements of Section 23.1459(a) (except
paragraphs (a)(3)(ii) and (6)), (b), (d)
and (e), or Section 25.1459(a) (except paragraphs (a)(3)(ii) and (7)), (b), (d) and (e)
of this chapter. A correlation must be
established between the values recorded by the flight data recorder and
the corresponding values being measured. The correlation must contain a
sufficient number of correlation points
to accurately establish the conversion
from the recorded values to engineering units or discrete state over the full
operating range of the parameter. Except for airplanes having separate altitude and airspeed sensors that are an
integral part of the flight data recorder
system, a single correlation may be established for any group of airplanes - 
(i) That are of the same type;
(ii) On which the flight recorder system and its installation are the same;
and
(iii) On which there is no difference
in the type design with respect to the
installation of those sensors associated
with the flight data recorder system.
Documentation sufficient to convert
recorded data into the engineering
units and discrete values specified in
the applicable appendix must be maintained by the certificate holder.
(g) Each flight recorder required by
this section that records the data specified in paragraphs (a) and (b) of this
section must have an approved device

to assist in locating that recorder
under water.
(h) The operational parameters required to be recorded by digital flight
data recorders required by paragraphs
(i) and (j) of this section are as follows,
the phrase  - when an information
source is installed -  following a parameter indicates that recording of that
parameter is not intended to require a
change in installed equipment.
(1) Time;
(2) Pressure altitude;
(3) Indicated airspeed;
(4) Heading - primary flight crew reference (if selectable, record discrete,
true or magnetic);
(5) Normal acceleration (Vertical);
(6) Pitch attitude;
(7) Roll attitude;
(8) Manual radio transmitter keying,
or CVR/DFDR synchronization reference;
(9) Thrust/power of each engine - primary flight crew reference;
(10) Autopilot engagement status;
(11) Longitudinal acceleration;
(12) Pitch control input;
(13) Lateral control input;
(14) Rudder pedal input;
(15) Primary pitch control surface position;
(16) Primary lateral control surface
position;
(17) Primary yaw control surface position;
(18) Lateral acceleration;
(19) Pitch trim surface position or parameters of paragraph (h)(82) of this
section if currently recorded;
(20) Trailing edge flap or cockpit flap
control selection (except when parameters of paragraph (h)(85) of this section apply);
(21) Leading edge flap or cockpit flap
control selection (except when parameters of paragraph (h)(86) of this section apply);
(22) Each Thrust reverser position (or
equivalent for propeller airplane);
(23) Ground spoiler position or speed
brake selection (except when parameters of paragraph (h)(87) of this section apply);
(24) Outside or total air temperature;
(25) Automatic Flight Control System (AFCS) modes and engagement
status, including autothrottle;

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