343 

Federal Aviation Administration, DOT 

§ 125.227 

number of correlation points to accu-
rately establish the conversion from 
the recorded values to engineering 
units or discrete state over the full op-
erating range of the parameter. Except 
for airplanes having separate altitude 
and airspeed sensors that are an inte-
gral part of the flight data recorder 
system, a single correlation may be es-
tablished for any group of airplanes— 

(1) That are of the same type; 
(2) On which the flight recorder sys-

tem and its installation are the same; 
and 

(3) On which there is no difference in 

the type design with respect to the in-
stallation 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 main-
tained by the certificate holder. 

(k) Each flight data recorder required 

by this section must have an approved 
device to assist in locating that re-
corder under water. 

(l) The following airplanes that were 

manufactured before August 18, 1997 
need not comply with this section, but 
must continue to comply with applica-
ble paragraphs of § 125.225 of this chap-
ter, as appropriate: 

(1) Airplanes that meet the Stage 2 

noise levels of part 36 of this chapter 
and are subject to § 91.801(c) of this 
chapter, until January 1, 2000. On and 
after January 1, 2000, any Stage 2 air-
plane otherwise allowed to be operated 
under Part 91 of this chapter must 
comply with the applicable flight data 
recorder requirements of this section 
for that airplane. 

(2) British Aerospace 1–11, General 

Dynamics Convair 580, General Dynam-
ics Convair 600, General Dynamics 
Convair 640, deHavilland Aircraft Com-
pany Ltd. DHC–7, Fairchild Industries 
FH 227, Fokker F–27 (except Mark 50), 
F–28 Mark 1000 and Mark 4000, Gulf-
stream Aerospace G–159, Jetstream 4100 
Series, Lockheed Aircraft Corporation 
Electra 10–A, Lockheed Aircraft Cor-
poration Electra 10–B, Lockheed Air-
craft Corporation Electra 10–E, Lock-
heed Aircraft Corporation Electra L– 
188, Lockheed Martin Model 382 (L–100) 
Hercules, Maryland Air Industries, Inc. 
F27, Mitsubishi Heavy Industries, Ltd. 

YS–11, Short Bros. Limited SD3–30, 
Short Bros. Limited SD3–60. 

(m) All aircraft subject to the re-

quirements of this section that are 
manufactured on or after April 7, 2010, 
must have a flight data recorder in-
stalled that also— 

(1) Meets the requirements in 

§ 25.1459(a)(3), (a)(7), and (a)(8) of this 
chapter; and 

(2) Retains the 25 hours of recorded 

information required in paragraph (f) 
of this section using a recorder that 
meets the standards of TSO–C124a, or 
later revision. 

(n) In addition to all other applicable 

requirements of this section, all Boeing 
737 model airplanes manufactured after 
August 18, 2000 must record the param-
eters listed in paragraphs (a)(88) 
through (a)(91) of this section within 
the ranges, accuracies, resolutions, and 
recording intervals specified in Appen-
dix E to this part. Compliance with 
this paragraph is required no later 
than February 2, 2011. 

[Doc. No. 28109, 62 FR 38387, July 17, 1997; 62 
FR 48135, Sept. 12, 1997, as amended by Amdt. 
125–42, 68 FR 42937, July 18, 2003; 68 FR 50069, 
Aug. 20, 2003; Amdt. 125–54, 73 FR 12568, Mar. 
7, 2008; Amdt. 125–56, 73 FR 73179, Dec. 2, 2008; 
Amdt. 125–54, 74 FR 32801, 32804, July 9, 2009] 

§ 125.227

Cockpit voice recorders. 

(a) No certificate holder may operate 

a large turbine engine powered airplane 
or a large pressurized airplane with 
four reciprocating engines unless an 
approved cockpit voice recorder is in-
stalled in that airplane and is operated 
continuously from the start of the use 
of the checklist (before starting en-
gines for the purpose of flight) to com-
pletion of the final checklist at the ter-
mination of the flight. 

(b) Each certificate holder shall es-

tablish a schedule for completion, be-
fore the prescribed dates, of the cock-
pit voice recorder installations re-
quired by paragraph (a) of this section. 
In addition, the certificate holder shall 
identify any airplane specified in para-
graph (a) of this section he intends to 
discontinue using before the prescribed 
dates. 

(c) The cockpit voice recorder re-

quired by this section must also meet 
the following standards: 

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