47-20-04 ERCO: (Was Mandatory Note 12 of AD-718-6.) Applies to 415-C, -CD and -D Aircraft Serial Numbers 113 Through 4399.
To be accomplished prior to August 1, 1947.
A positive locking device must be installed on the zipper in the baggage compartment bottom to prevent its opening and permitting articles to fall through and foul the controls.
(Erco's Ercoupe Service Department Bulletin No. 17 dated January 6, 1947, covering this same subject, provides a satisfactory method for safetying the bottom baggage compartment zipper.)