A-93-169
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE, APPLICABLE TO TWIN COMMANDER 690 SERIES AIRPLANES WITH FRISE AILERONS, REQUIRING A CHECK OF AILERON CONTROL SYSTEM RIGGING AND SYNCHRONIZATION, PRIMARY AND BALANCE CABLE TENSIONS, ADJUSTMENT OF MECHANICAL CONTROL STOPS, AND RIGGING AND FREE-PLAY DEFLECTION OF THE AILERON TRIM TAB, IN ACCORDANCE WITH TWIN COMMANDER MAINTENANCE PROCEDURES TO ENSURE PROPER LATERAL WHEEL FORECE CONTROL GRADIENTS. (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to issue an urgent airworthiness directive for Twin Commander 690 series airplanes with Frise ailerons. The directive would require checking the aileron control system rigging, cable tensions, control stops, and trim tab adjustments per the manufacturer's maintenance procedures to ensure proper lateral wheel force control gradients.
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 Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | May 25, 1995 |
| NTSB number | LAX93FA333 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).