A-99-025
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Require all 14 Code of Federal Regulations part 121 air carrier operators of the Boeing 737 to provide their flight crews with initial and recurrent flight simulator training in the "uncommanded yaw or roll" and "jammed or restricted rudder" procedures in Boeing's 737 operations manual. The training should demonstrate the inability to control the airplane at some speeds and configurations by using the roll controls (the crossover airspeed phenomenon) and include performance of both procedures in their entirety. (Supersedes Safety Recommendation A-96-107, A-96-109, A-96-112, and A-96-113)
In plain language (FlightFinder summary)
The Federal Aviation Administration must require all Boeing 737 operators under 14 CFR part 121 to provide flight crews with initial and recurrent simulator training on “uncommanded yaw or roll” and “jammed or restricted rudder” procedures from Boeing’s 737 manual. The training should demonstrate the crossover airspeed phenomenon (where roll controls cannot maintain control at some speeds and configurations) and include performing both procedures fully.
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 3, 2002 |
| NTSB number | DCA94MA076 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).