Action
Notice of proposed rulemaking (NPRM).
Summary
We propose to adopt a new airworthiness directive (AD) for Bell Model 430 helicopters, which would require replacing certain components of the air data system. This proposed AD is prompted by the discovery of incorrect indicated airspeed when the helicopter was tested to the cold temperature limits (-40 degrees centigrade) required for Category A operations. The proposed actions are intended to correct the published V<INF>ne</INF> and to correct the indicated airspeed.