(2)
Thedurationofoxygen .ow,inminutes,forthereplaceablegeneratorelement; and
(3)
A warning thatthe replaceablegenerator element may behot, unlessthe ele-ment construction is such that the surface temperature cannot exceed 100 degrees F.]
Amdt. 25-41, E.. 9/1/77
FAR25.1451 :[Removed.]
[Removed.] Amdt. 25-72, E.. 8/20/90
FAR 25.1453 : Protection of oxygen equipment from rupture.
Oxygenpressuretanks, andlinesbetweentanks andthe shuto. means, mustbe–
(a)
Protected from unsafe temperatures; and
(b)
Located where the probability and hazards of rupture in a crash landing are mini-mized.
FAR 25.1455 : Draining of .uids subject to freezing.
[If .uids subject to freezing may be drained overboard in .ight or during ground operation, thedrains mustbedesigned andlocated toprevent theformation ofhazardous quantities of ice on the airplane as a result of the drainage.] Amdt. 25-23, E.. 5/8/70
FAR 25.1457 : Cockpit voice recorders.
(a)
Each cockpit voice recorder required by the operating rules of this chapter must be approved and must be installed so that it will record the following :
(1)
Voice communications transmitted from or received in the airplane by radio.
(2)
Voice communications of .ight crewmembers on the .ight deck.
(3)
Voice communications of .ight crewmembers on the .ight deck, using the air-plane’s interphone system.
(4)
Voice or audio signals identifying navigation or approach aids introduced into a headset or speaker.
(5)
Voice communications of .ight crewmembers using the passenger loudspeaker system, if there is such a system and if the fourth channel is available in accordance withthe requirements ofparagraph(c)(4)(ii) ofthis section.
(b)
The recordingrequirements ofparagraph(a)(2) ofthis section mustbe metbyinstal-ling a cockpit-mounted area microphone,locatedinthebestpositionfor recording voice communications originating at the .rst and second pilot stations and voice communications of other crewmembers on the .ight deck when directed to those stations. The microphone must be so located and, if necessary, the preampli.ers and .ltersof therecordermustbesoadjusted orsupplemented,thattheintelligibi-lity of the recorded communications is as high as practicable when recorded under .ight cockpit noise conditions and played back. Repeated aural or visual playback of the record may be used in evaluating intelligibility.
(c)
Each cockpitvoicerecordermustbeinstalled sothatthepartof the communication oraudiosignalsspeci.edinparagraph(a) of this sectionobtainedfromeach of the following sources is recorded on a separate channel :
(1)
[For the .rst channel, from each boom, mask, or hand-heldmicrophone, head-set, or speaker used at the .rst pilot station.
(2)
For the second channel, from each boom, mask, or hand-held microphone, headset, or speaker used at the second pilot station.
(3)
For the third channel–from the cockpit-mounted area microphone.
(4)
For the fourth channel, from–
(i)
Each boom, mask, or hand-held microphone, headset, or speaker used at the stations for the third and fourth crewmembers; or]
(ii)
If the stations speci.ed in subdivision (i) of this subparagraph are not required or if the signal at such a station is picked up by another chan-nel, each microphone on the .ight deck that is used with the passenger loudspeaker system, if its signals are not picked up by another channel.
(5)
[As far as is practicable allsounds received by the microphone listed in para-graphs(c)(1),(2), and(4) of this section mustbe recorded withoutinterrup-tionirrespectiveof theposition of theinterphone-transmitterkey switch.The designshall ensurethatsidetoneforthe .ight crewisproduced only whenthe interphone, public address system, or radio transmitters are in use.]
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本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 4(34)
