A-91-090
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REVISE ADVISORY CIRCULAR (AC) 20-73, "AIRCRAFT ICE PROTECTION," AND AC 23.1419-1, "CERTIFICATION OF SMALL AIRPLANES FOR FLIGHT IN ICING CONDITIONS," TO INCLUDED GUIDANCE FOR THE FULFILLMENT OF 14 CFR PARTS 23.1416(C) AND 25.1416(C) BY ENSURING THAT PNEUMATIC PRESSURE THRESHOLD AT WHICH EACH DEICE BOOT INDICATION LIGHT IS DESINGED TO ILLUMINATE IS SUFFICIENT PRESSURE FOR EFFECTIVE PNEUMATIC DEICE BOOT OPERATION.
In plain language (FlightFinder summary)
The National Transportation Safety Board asks the Federal Aviation Administration to update Advisory Circular (AC) 20-73 and AC 23.1419-1, adding guidance that the pressure threshold at which each deice boot indication light illuminates must be sufficient for effective pneumatic deice boot operation, as required by 14 CFR Parts 23.1416(c) and 25.1416(c).
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 Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | Jan 12, 2000 |
| 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).