A-94-063
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REVIEW ALL OTHER TURBOPROPELLER AIRPLANE DESIGNS TO DETERMINE WHETHER IN-FLIGHT ENGINE OPERATION IN THE BETA RANGE SHOULD BE PROHIBITED. ISSUE APPROPRIATE AIRWORTHINESS DIRECTIVES APPLICABLE TO THOSE AIRPLANES TO INSTALL A SYSTEM TO PREVENT MOVEMENT OF POWER LEVERS INTO THE BETA RANGE, AND REQUIRE APPROPRIATE WARNINGS IN AIRPLANE OPERATING MANUALS AND ON COCKPIT PLACARDS TO WARN PILOTS NOT TO MOVE POWER LEVERS INTO THE BETA RANGE IN FLIGHT, UNLESS THE AIRPLANE IS CERTIFICATED FOR SUCH USE. (Supersedes Safety Recommendations A-88-105 and A-90-182)
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to review all other turbopropeller airplane designs to decide whether in-flight engine operation in the beta range should be prohibited. It must then issue airworthiness directives to install a system that prevents movement of power levers into the beta range and require warnings in airplane operating manuals and cockpit placards, unless the airplane is certificated for such use.
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 | May 11, 2000 |
| NTSB number | DCA94MA033 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).