A-70-036
NTSB Safety Recommendation — Aviation
Recommendation text
THE BOARD RECOMMENDS THAT WHEN USE OF THE TRANSITION ALTITUDE IS REQUIRED OR OPTED, THE CONTROLLERS AGAIN GIVE THE CURRENT ALTIMETER SETTING AS THE AIRCRAFT IS CLEARED TO DESCEND BELOW 18,000 FEET. THIS PROCEDURE SHOULD OBVIATE ANY POSSIBLE CHANCE OF OVERLOOKING OR FORGETTING TO SET THE ALTIMETERS PROPERLY. THE BOARD RECOMMENDS THAT, IF THE PAR LISTING IS TO BE CARRIED ON ALL APPROACH CHARTS FOR THE FACILITY WHERE IT IS INSTALLED, THE NUMBER OF THE RUNWAY(S) SERVED BY THAT PAR BE ADDED TO THE LEGEND.
In plain language (FlightFinder summary)
The NTSB urges the FAA to ensure air traffic controllers provide current altimeter settings when clearing aircraft to descend below 18,000 feet if a transition altitude is in use. This step aims to prevent pilots from forgetting or missing the necessary adjustment to their instruments. Additionally, the board suggests that approach charts should clearly list which runways are served by any installed PAR system.
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 | Feb 4, 1971 |
| NTSB number | DCA69A0012 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).