A-91-088
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REVIEW THE AIRRAME ICING CERTIFICATION DATA FOR EXISTING PART 23 AND PART 25 AIRPLANES TO VERIFY THAT THE FLIGHT PROFILES EXAMINED INCLUDED ICE ACCUMULATED AT THOSE CRUISE AND APPROACH FLAP CONFIGURATIONS IN WHICH EXTENSIVE EXPOSURE TO ICING CONDITIONS CAN BE EXPECTED, WITH SUBSEQUENT CHANGES IN CONFIGURATION, TO INCLUDE LANDING FLAPS. REQUIRE ADDITIONAL FLIGHT TESTS AS NECESSARY.
In plain language (FlightFinder summary)
The National Transportation Safety Board asks the Federal Aviation Administration to review icing certification data for Part 23 and Part 25 airplanes, ensuring that flight profiles account for ice buildup during cruise and approach flap configurations, including landing flaps. The FAA should also require additional flight tests if needed.
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 | Jan 7, 1999 |
| NTSB number | DCA90MA011 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).