A-81-019
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: INSTRUCT ALL AIR CARRIERS TO INCLUDE IN THEIR FLIGHTCREW PROCEDURES INSTRUCTIONS WHICH REQUIRE AN IMMEDIATE RESPONSE TO THE GROUND PROXIMITY SYSTEM'S TERRAIN CLOSURE "PULL-UP" WARNING WHEN PROXIMITY TO THE TERRAIN CONNOT BE VERIFIED INSTANTLY BY VISUAL OBSERVATION. THE REQUIRED RESPONSE TO THIS WARNING SHOULD BE THAT THE MAXIMUM AVAILABLE THRUST BE APPLIED AND THAT THE AIRCRAFT BE ROTATED TO ACHIEVE THE BEST ANGLE CLIMB WITHOUT DELAY.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to require all air carriers to add a procedure in their flightcrew instructions mandating an immediate response to the ground proximity system's terrain closure "pull-up" warning when terrain proximity cannot be instantly confirmed by sight. The required response must be to apply maximum available thrust and rotate the aircraft to achieve the best angle climb without any delay.
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 | Dec 10, 1981 |
| NTSB number | DCA78AA012 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).