74-19-04 SIKORSKY: Amendment 39-1953. Applies to all HRS/H-19 Series Helicopters certificated in all categories.
Compliance with each of the following Airworthiness Directives for the Sikorsky S-55 Series Helicopters is required, except that the effective date of each will be the effective date of this Airworthiness Directive: 54-1-3, 54-13-1, 54-16-1, 54-19-2, 54-20-2, 55-25-4, 56-16-3, 56- 23-3, 60-13-4, 63-5-2 (AD 63-5-2 extended service life to 1200 hours when operating in the Restricted Category and over sparsely populated areas), 65-8-2, 66-4-3 (AD 66-4-3 extended service life to 3500 hours, when operating in the Restricted Category and over sparsely populated areas), 67-17-6, 67-29-7 and 71-26-3.
This amendment becomes effective September 10, 1974.