Service Letters

Replacement of PN 369A1613-3 – Metal Tail Rotor Blade Assemblies


Required Inspections and Critical Inspection Areas


Restriction of N2 Operating Speed


Service Letter AND Notice AND Bulletin Designation


Shut Down Procedure – Allison Model 250-C20 Series Engine


Special Tools for Installation of Tail Rotor Control Rod Grommets PN WSI-B-12AS


Special Wrenches for Field Replacement of Main Rotor Pitch Bearing Studs


Start Pump Wire Routing


Substitution of Wet Spline Drive Starter-Generator for Existing Dry Spline Drive Starter-Generator


Surplus or Bogus 369D21100 Series Main Rotor Blades


Tail Rotor Driveshaft Flexible Coupling PN 369A5501 and 369H92564 Treatment With Molykote Metal Protector


Tail Rotor Swash – Cold Weather Operation


TECHNICAL PUBLICATIONS ON-LINE ORDERING SYSTEM


TECHNICAL PUBLICATIONS PRICE INCREASE


Torque Event AND Retirement Index Number (TE-RIN) Explanation


Torque Requirement for Driveshaft Coupling Retainer Bolts PN 369A5528


Transfer of Ownership of the Light Helicopter Line


Unauthorized Distribution of Main Rotor Hub Overhaul Manual


UNAUTHORIZED DISTRIBUTION OF MAIN ROTOR HUB