A-87-088
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: AMEND 14 CFR PARTS 23 AND 25 TO REQUIRE THAT ALL NEWLY MANUFACTURED AIRCRAFT AND NEW COCKPIT VOICE RECORDER INSTALLATIONS BE DESIGNED SUCH THAT AN UNINTERRUPTED RECORDING FROM THE BOOM OR MASK MICROPHONES AND HEAD PHONES FOR EACH FLIGHT CREWMEMBER'S POSITION AND FROM AN AREA MICROPHONE CAN BE MADE ON DEDICATED CHANNELS OF THE CVR. ON THOSE AIRCRAFT REQUIRING ONLY TWO FLIGHT CREW MEMBERS, THE UNUSED CHANNEL SHOULD RECORD THE PASSENGER ADDRESS AUDIO SIGNAL WHEN AVAILABLE. A SIDETON SHALL BE PRODUCED ONLY WHEN THE TRANSMITTER OR INTERPHONE IS SELECTED, AND, IN ADDITION, ALL AUDIO SIGNALS RECEIVED BY HAND-HELD MICROPHONES SHALL BE RECORDED ON THE RESPECTIVE CREWMEMBER'S CHANNEL WHEN KEYED TO THE "ON" POSITION. (Supersedes Safety Recommendations A-78-028, A-82-064 through A-82-067, A-82-106 through A-82-111)
In plain language (FlightFinder summary)
The FAA is asked to amend 14 CFR Parts 23 and 25 to require that new aircraft and cockpit voice recorder installations be designed to record each flight crewmember's boom or mask microphone, headphone audio, and an area microphone on dedicated channels. On two-crew aircraft, the unused channel should record passenger address audio when available. The rule would also specify that sidetone only occurs when the transmitter or interphone is selected, and that hand-held microphone audio is recorded on the respective crewmember's channel when keyed on.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Acceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Mar 8, 1989 |
| NTSB number | 80663 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).