84-04-03 THE BALLOON WORKS: Amendment 39-4821. Applies to Model Firefly 7B (Twelve Gore) (Serial Numbers F7B-009, F7B-011 through F7B-044, and F7B-046 through F7B- 080) Hot Air Balloons certificated in any category.
Compliance: Required within the next 10 hours time in service after the effective date of this AD, unless already accomplished.
To prevent breakage of jumper cords, which may result in uncontrollable descent, accomplish the following:
(a) Lengthen each envelope jumper cord, shorten each centering cord, inflate envelope and examine valve fit and adjust, if necessary, in accordance with The Balloon Works Service Bulletin No. B20, dated June 29, 1983.
(b) An equivalent means of compliance with this AD may be used if approved by the Manager, Atlanta Aircraft Certification Office, FAA Central Region, 1075 Inner Loop Road, College Park, Georgia 30337.
This amendment becomes effective on April 9, 1984.