79-19-03 SHORT BROTHERS LIMITED: Amendment 39-3553. Applies to Model SD3-30 airplanes, S/Nos. SH 3004, 3005, 3006, 3007, and 3008, certificated in all categories.
Compliance is required prior to the accumulation of 10,000 flights, unless already accomplished.
To prevent failure of the fuselage skin panel buttstraps, accomplish the following:
(a) Replace or reinforce the original fuselage skin panel buttstraps in accordance with Section 2, "Accomplishment Instructions" of Short Brothers Ltd. Service Bulletin SD3-53- 28, dated May 5, 1978, or an equivalent approved by the Chief, Aircraft Certification Staff, AEU- 100, Europe, Africa, and Middle East Region, Federal Aviation Administration, c/o American Embassy, Brussels, Belgium.
(b) For purposes of complying with this AD, a flight is defined as one takeoff and one landing.
This amendment becomes effective October 4, 1979.