A-94-181
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: CONDUCT A SPECIAL CERTIFICATION REVIEW OF THE ATR-42 AND ATR-72 AIRPLANES, INCLUDING FLIGHT TESTS AND/OR WIND TUNNEL TESTS, TO DETERMINE THE AILERON HINGE MOMENT CHARACTERISTICS OF THE AIRPLANES OPERATING WITH DIFFERENT AIRSPEEDS AND CONFIGURATIONS DURING ICE ACCUMULATION AND WITH VARYING ANGLES OF ATTACH FOLLOWING ICE ACCRETION. AS A RESULT OF THE REVIEW, REQUIRE MODIFICATIONS AS NECESSARY TO ASSURE SATISFACTORY FLYING QUALITIES AND CONTROL SYSTEM STABILITY IN ICING CONDITIONS.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to conduct a special certification review of ATR-42 and ATR-72 airplanes, including flight and/or wind tunnel tests, to evaluate aileron hinge moment characteristics under varying airspeeds, configurations, ice accumulation, and angles of attach after ice accretion. Based on the review, the FAA must require modifications as needed to ensure satisfactory flying qualities and control system stability in icing conditions.
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 | Jul 9, 1996 |
| NTSB number | DCA95MA001 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).