A-86-113
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE THE INSTALLATION AND USE OF CREW INTERPHONE SYSTEMS IN THE COCKPITS OF THOSE AIRCRAFT WHICH ARE USED IN 14 CFR 135 PASSENGER-CARRYING OPERATIONS AND IN WHICH THE NOISE LEVELS EXCEED A PREFERRED FREQUENCY SPEECH INTERFERENCE LEVEL OF 78 AT ANY POWER SETTING AND FLIGHT CONDITION, AND REMOVE THE CREW INTERPHONE SYSTEM AS AN ITEM ON THE MASTER MINIMUM EQUIPMENT LIST. (Supersedes Safety Recommendations A-81-075 and A-81-076)
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to require that crew interphone systems be installed and used in the cockpits of aircraft used under 14 CFR 135 for passenger-carrying flights when cockpit noise exceeds a speech interference level of 78. Additionally, the FAA must remove the crew interphone system from the Master Minimum Equipment List.
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| Status | Closed--No Longer Applicable |
|---|---|
| Mode | Aviation |
| Closed | Oct 28, 1992 |
| NTSB number | DCA85AA035 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).