A-82-143
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION. SUSPEND THE AIRWORTHINESS CERTIFICATE OF THE ROBINSON R-22 MODEL HELICOPTER UNTIL (1) THE MAIN ROTOR SYSTEM STABILITY/STALL CHARACTERISTICS AND THE MAIN ROTOR RPM DECAY RATES ARE DETERMINED TO PROVIDE ADEQUATE MARGINS OF SAFETY AND TO BE COMPATIBLE WITH NORMAL PILOT REACTION TIMES, AND (2) THE R-22 MAIN ROTOR SYSTEM IS DETERMINED TO BE IN COMPLIANCE WITH 14 CFR 27.661. (URGENT)
In plain language (FlightFinder summary)
The NTSB asks the FAA to suspend the airworthiness certificate for the Robinson R-22 helicopter until two requirements are met: (1) the main rotor system's stability, stall characteristics, and RPM decay rates are shown to have adequate safety margins and be compatible with normal pilot reaction times, and (2) the main rotor system complies with 14 CFR 27.661. The recommendation is marked urgent.
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 | Apr 7, 1983 |
| NTSB number | FTW82FA402 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).