A-92-064
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE, APPLICABLE TO AIRPLANES USING PNEUMATIC AIRFRAME DEICING SYSTEMS, REQUIRING THAT THE CONTROL SWITCHES FOR THESE SYSTEMS BE MODIFIED SO THAT A SINGLE MANUAL ACTIVATION OF THE SWITCH WILL ALLOW A COMPLETE CYCLE OF THE WING AND TAIL LEADING EDGE DEICING SYSTEM. REQUIRE THAT MODELS OF THESE AIRPLANES CURRENTLY IN SERVICE BE RETROFITTED WITH THIS MODIFICATION.
In plain language (FlightFinder summary)
The Federal Aviation Administration is urged to mandate a change in how pilots operate deicing systems on certain aircraft. This rule would ensure that flipping a switch once completes the full cycle of clearing ice from the wings and tail, rather than requiring repeated manual input. Additionally, existing planes already in service must be updated to include this improved control mechanism.
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 | Oct 29, 1996 |
| NTSB number | DCA91MA019 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).