344 

14 CFR Ch. I (1–1–19 Edition) 

§ 125.228 

(1) The requirements of part 25 of this 

chapter in effect after October 11, 1991. 

(2) After September 1, 1980, each re-

corder container must— 

(i) Be either bright orange or bright 

yellow; 

(ii) Have reflective tape affixed to the 

external surface to facilitate its loca-
tion under water; and 

(iii) Have an approved underwater lo-

cating device on or adjacent to the con-
tainer which is secured in such a man-
ner that it is not likely to be separated 
during crash impact, unless the cockpit 
voice recorder and the flight recorder, 
required by § 125.225 of this chapter, are 
installed adjacent to each other in such 
a manner that they are not likely to be 
separated during crash impact. 

(d) In complying with this section, an 

approved cockpit voice recorder having 
an erasure feature may be used so that, 
at any time during the operation of the 
recorder, information recorded more 
than 30 minutes earlier may be erased 
or otherwise obliterated. 

(e) For those aircraft equipped to 

record the uninterrupted audio signals 
received by a boom or a mask micro-
phone the flight crewmembers are re-
quired to use the boom microphone 
below 18,000 feet mean sea level. No 
person may operate a large turbine en-
gine powered airplane or a large pres-
surized airplane with four recipro-
cating engines manufactured after Oc-
tober 11, 1991, or on which a cockpit 
voice recorder has been installed after 
October 11, 1991, unless it is equipped to 
record the uninterrupted audio signal 
received by a boom or mask micro-
phone in accordance with § 25.1457(c)(5) 
of this chapter. 

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

currence requiring immediate notifica-
tion of the National Transportation 
Safety Board under 49 CFR part 830 of 
its regulations, which results in the 
termination of the flight, the certifi-
cate holder shall keep the recorded in-
formation for at least 60 days or, if re-
quested by the Administrator or the 
Board, for a longer period. Information 
obtained from the record is used to as-
sist in determining the cause of acci-
dents or occurrences in connection 
with investigations under 49 CFR part 
830. The Administrator does not use the 

record in any civil penalty or certifi-
cate action. 

(g) By April 7, 2012, all turbine en-

gine-powered airplanes subject to this 
section that are manufactured before 
April 7, 2010, must have a cockpit voice 
recorder installed that also— 

(1) Meets the requirements of 

§ 25.1457(a)(3), (a)(4), (a)(5), and (d)(6) of 
this chapter; 

(2) Retains at least the last 2 hours of 

recorded information using a recorder 
that meets the standards of TSO–C123a, 
or later revision; and 

(3) Is operated continuously from the 

start of the use of the checklist (before 
starting the engines for the purpose of 
flight), to the completion of the final 
checklist at the termination of the 
flight. 

(h) All turbine engine-powered air-

planes subject to this section that are 
manufactured on or after April 7, 2010, 
must have a cockpit voice recorder in-
stalled that also— 

(1) Is installed in accordance with the 

requirements of § 25.1457 (except for 
paragraph (a)(6)) of this chapter; 

(2) Retains at least the last 2 hours of 

recorded information using a recorder 
that meets the standards of TSO–C123a, 
or later revision; and 

(3) Is operated continuously from the 

start of the use of the checklist (before 
starting the engines for the purpose of 
flight), to the completion of the final 
checklist at the termination of the 
flight. 

(4) For all airplanes manufactured on 

or after December 6, 2010, also meets 
the requirements of § 25.1457(a)(6) of 
this chapter. 

(i) All airplanes required by this part 

to have a cockpit voice recorder and a 
flight data recorder, that install 
datalink communication equipment on 
or after December 6, 2010, must record 
all datalink messages as required by 
the certification rule applicable to the 
airplane. 

[Doc. No. 25530, 53 FR 26149, July 11, 1988, as 
amended by Amdt. 125–54, 73 FR 12568, Mar. 7, 
2008; Amdt. 125–54, 74 FR 32801, July 9, 2009; 
Amdt. 125–60, 75 FR 17046; Apr. 5, 2010] 

§ 125.228

Flight data recorders: fil-

tered data. 

(a) A flight data signal is filtered 

when an original sensor signal has been 

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