A-02-027
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Conduct a survey of transport-category aircraft to determine which are equipped with cabin altimeters that are capable of displaying indications beyond the marked ranges of the gauge and require that the cabin altimeter gauges on those airplanes be modified to ensure that they will indicate the correct cabin altitude to the flight crew, particularly when the pressurization system is being operated in the manual mode. This could be accomplished either by the replacement of the gauge with a digital display, by the expansion of the values on the existing gauge design, or by other means.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to survey transport-category aircraft to identify those with cabin altimeters that can show readings outside their marked ranges, and then require modifications—such as replacing the gauge with a digital display or expanding the scale—to ensure the flight crew gets accurate cabin altitude readings, particularly during manual pressurization system operation.
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 | Jan 5, 2009 |
| NTSB number | MIA01FA029 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).