Narrative:

I installed a tail rotor blade and hub assembly on one of our bell 206 fleet aircraft. This assembly was built up by our company; air X; maintenance shop and delivered to our maintenance base for installation. Assembly was ordered by another air X employee in ZZZ; but I don't know who it was. Assembly was sent with historical service records. In november 2010; an implementation and operational support team mechanic was working at our base; where aircraft X is assigned to; and reported there was no dampner weight installed on the tail skid; and that it was required to be installed when a lord elastomeric hub is used. After talking with our regional maintenance manager and company district office manager; it was discovered this elastomeric hub was part of a lord stc (supplemental type certificate). I didn't know about this and installed the [tail rotor] blade/hub assembly with an FAA form 337; issued for the van horn composite blade stc. [There was] no FAA form 337 [included] with the lord elastomeric hub stc. The blade and hub assembly I removed was also an elastomeric hub from a previous installation; built up by our company's maintenance shop. So without knowledge of an stc requirement [for the elastomeric hub]; the tail rotor was replaced as a normal [installation].

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Original NASA ASRS Text

Title: A Technician reports he installed an Elastomeric Tail Rotor Hub and Composite Blade Assembly on a Bell 206 Ranger helicopter. Another Mechanic later informed him the hub assembly should have had a Supplemental Type Certificate (STC) and FAA Form 337 included in the paperwork. A tail skid dampner counterweight was also missing.

Narrative: I installed a Tail Rotor Blade and Hub Assembly on one of our Bell 206 fleet aircraft. This assembly was built up by our company; Air X; maintenance shop and delivered to our maintenance base for installation. Assembly was ordered by another Air X employee in ZZZ; but I don't know who it was. Assembly was sent with historical service records. In November 2010; an Implementation and Operational Support Team Mechanic was working at our base; where Aircraft X is assigned to; and reported there was no dampner weight installed on the tail skid; and that it was required to be installed when a Lord Elastomeric Hub is used. After talking with our Regional Maintenance Manager and Company District Office Manager; it was discovered this Elastomeric Hub was part of a Lord STC (Supplemental Type Certificate). I didn't know about this and installed the [tail rotor] blade/hub assembly with an FAA Form 337; issued for the Van Horn Composite Blade STC. [There was] no FAA Form 337 [included] with the Lord Elastomeric Hub STC. The blade and hub assembly I removed was also an Elastomeric Hub from a previous installation; built up by our company's Maintenance shop. So without knowledge of an STC requirement [for the Elastomeric Hub]; the tail rotor was replaced as a normal [installation].

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.