Service Bulletins

Inspection of PN 369A3511-15 and 369A3511-17 – Tailboom Bracket Assemblies AND Tail Rotor Transmission Attachment


Inspection of PN 369A7003-3 Swashplate Bearing


INSTALLATION – NEW VNE PLACARDS


Installation of Aluminum Type Main Rotor Blade Pendulum Weight Vibration Absorber Assembly PN 369N2697


Installation of Collective Stick Support Bracket Reinforcement Strap


Installation of Nickel-Cadmium Battery Temperature Sensing Modification Kit PN M50037 or M50038


Installation of Oil Flow Restricting Devices into the Engine Oil and Torque Pressure Sensing System


Instrument Cluster 3-Pack Conversion – AC to Rochester


Instrument Cluster 4-Pack Conversion AC to Rochester


Kamatics Shaft And Coupling Overhaul Program


KIT INSTALLATION (M30209) – ENGINE FUEL FILTER PRESSURE SWITCH


KIT INSTALLATION (M50027) – MODIFICATION TRANSMISSION AND COUPLING FAN ASSEMBLY


Kit Installation, PN 369D290140 – Auxiliary Fairing and Seals Air Filter (Particle Separator)


Landing Gear Strut Inspection and Fairing Modification


M30223 KIT INSTALLATION – MAIN ROTOR LOCKNUT AND RETAINING RING


Main Rotor Blade Assembly Torque Event Inspection (Ref. AD2005-21-02)


Main Rotor Blade Root End Inspection (Ref. AD96-10-09)


Main rotor Blade Root End Inspection and Termination Action for Suspect Main rotor Blades (Ref. AD98-15-26)


Main Rotor Brake System PN 369H90123 Series – Installation of Master Cylinder stop PN 369D292585


MAIN ROTOR HUB LEAD LAG LINK ASSEMBLY INSPECTION AND DAILY PRE-FLIGHT CHECK