Document ID: chunk:federal_register_of_legislation:F2006B06737:body:0:p2
Version: federal_register_of_legislation:F2006B06737
Segment Type: other
Provision Reference: 
Character Range: 3005–3885

one of the following kits:

                1. for Model S-76A helicopters S/N 760001 through 760237 inclusive, AC Generator Interlock Kit (Kit) Part Number (P/N) 33776-84790-012, or

b.    for Model S-76A helicopters S/N 760238 and higher, Kit P/N 33776-84790- 011.

           This Airworthiness Directive becomes effective on 25 May 1999.

           Background: The FAA has advised that S-76A helicopters with Turbomeca Arriel 1S1 may fail to achieve the specified single engine performance if the AC generator interlock system is not installed. This Directive requires an inspection to determine if the AC generator interlock system is installed and, if necessary, the installation of a warning placard.

           The Directive also provides for an optional terminating action allowing removal of the placard and operation limitation imposed by the temporary RFMS revision.