A-82-083
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE TO IMPLEMENT THE NECESSARY AIRPLANE MODIFICATIONS AND/OR CHANGES IN OPERATIONAL PROCEDURES FOR B-737 AIRCRAFT TAKEOFF OPERATIONS DURING WEATHER OR RUNWAY CONDITIONS CONDUCIVE TO THE FORMATION OF LEADING EDGE FROST, SNOW, OR ICE CONTAMINATION TO REQUIRE EITHER: (1) THAT THE LEADING EDGE IS FREE OF FROZEN CONTAMINANT THROUGH THE PRE-TAKEOFF USE OF A GROUND-OPERABLE WING THERMAL ANTI-ICE SYSTEM, OR (2) AN INCREASED STALL AIRSPEED MARGIN AT LIFTOFF WHICH WILL PROVIDE ADEQUATE PITCH AND ROLL CONTROL TO COUNTER THE EFFECTS OF UNDETECTED LEADING EDGE CONTAMINANTS BY MODIFICATION OF TAKEOFF FLAPS CONFIGURATION AND/OR INCREASE TAKEOFF AIRSPEED SCHEDULES.
In plain language (FlightFinder summary)
The NTSB asks the Federal Aviation Administration to issue an airworthiness directive for Boeing 737 aircraft operating in weather or runway conditions that can cause leading edge frost, snow, or ice. The directive would require either a clean leading edge using a ground-operable wing thermal anti-ice system before takeoff, or an increased stall airspeed margin at liftoff—achieved through modified takeoff flaps configuration or increased airspeed schedules—to ensure adequate pitch and roll control if contamination is undetected.
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 - Unacceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Jun 1, 1983 |
| NTSB number | DCA82AA011 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).