Below are links to documents pertaining to VHA 206B main rotor blade, part number 20631000-101 (Original MRB).
Installation and Warranty Information
206B Main Rotor Blade READ ME FIRST with Warranty Info
Supplemental Type Certificates
FAA Supplemental Type Certificate (STC) SR02577LA
Transport Canada Supplemental Type Certificate (STC)
Instructions for Continued Airworthiness
206B Main Rotor Blade ICA VMM-MR-206B-501 Rev F