78-21-02 BELL: Amendment 39-3317. Applies to all Bell Helicopter Models 204B, 205A, 205A-1, and 212 modified by Chadwick, Inc., STC's SH149WE or SH17NW.
Prior to further flight involving external-load operations over congested or densely populated areas, replace Chadwick, Inc., load cell link assembly P/N 47-40200-19 with parts approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Northwest Region.
This amendment is effective October 12, 1978, and was effective earlier for all recipients of the airmail letter dated September 18, 1978, which contained this amendment.