Airworthiness Directive · Amendment 39-9438 · Bell Helicopter Textron, a Division of Textron Canada, Model 206B and 206L Helicopters
Bell Helicopter Textron, a Division of Textron Canada, Model 206B and 206L Helicopters
Model 206B and 206L helicopters, equipped with Allison 250-C20R engine power-out warning sensors, part number (P/N) 206-075-545-001, in accordance with Supplemental Type Certificate (STC) No. SH4169NM (applicable to Model 206L), SH4179NM (applicable to Model 206B), or SH4729NM (applicable to both Models 206B & L), certificated in any category.
This amendment supersedes an existing airworthiness directive (AD), applicable to Bell Helicopter Textron, a Division of Textron Canada (BHT), Model 206B and 206L helicopters, that currently requires a revision to the Limitations section of the FAA-approved Supplemental Type Certificate (STC) Rotorcraft Flight Manual Supplement (RFMS) until replacement of the engine power-out warning sensor on BHT Model 206B and 206L helicopters equipped with Allison 250-C20R engines in accordance with certain supplemental type certificates. This amendment requires a revision to the Limitations section of the STC RFMS, but removes the requirement for replacement of the engine power-out warning sensor. This amendment is prompted by a reevaluation of the need for an engine power-out warning sensor based on the lack of reported operational occurrences of the false engine-out warnings. The actions specified by this AD are intended to maintain a heightened pilot awareness that false engine-out warnings may occur when practicing autorotations and could result in an unnecessary emergency autorotative landing.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
