80-02-12 MOONEY AIRCRAFT CORPORATION: Amendment 39-3670. Applies to Models M20K airplanes, Serial Numbers 25-0001 through 25-0247, certificated in all categories.
Compliance is required as indicated unless already accomplished.
To prevent possible failure of the fuselage tubular structure, accomplish the following:
1. Within the next 90 days after the effective date of the AD, reinforce the lower right fuselage tubular structure with a split-sleeve and clamps in accordance with Mooney Service Bulletin No. M20-220 dated November 16, 1979, or equivalent methods approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region.
2. Aircraft may be flown in accordance with FAR 21.197(a)(1) to a location where the modification required by this AD may be accomplished.
This amendment becomes effective February 1, 1980.