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Aviation Alerts and Advisories

Installation of GFC 600H Yaw Servo Bracket in Bell Helicopter Model 505

PRODUCTS AFFECTED:

GFC 600H systems installed under the GFC 600H Bell 505 STC SR01961WI, Master Drawing List Revisions 1 through 3 in Bell Helicopters Model 505 (trade name Jet Ranger X) are affected.

CERTIFICATION AUTHORIZATION:

STC SR01961WI

COMPLIANCE:

MANDATORY: This STC Service Bulletin is mandatory and must be implemented within 12 months from the date of issue.

PURPOSE:

Specified rivet material (aluminum) is not compatible with carbon fiber reinforced plastic and will lead to galvanic corrosion on contact with the frame. This Mandatory STC Service Bulletin provides instructions to replace yaw servo bracket fasteners.

WARRANTY INFORMATION:

This modification is warranty reimbursable, with a deadline of October 31, 2022.

NOTE
New installations completed after October 6, 2021 are not eligible for warranty reimbursement.

ASDN Service Bulletin 21103 Rev A