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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
AD 47-06-09

Airworthiness Directives; Beech Models AT-11 and C18S Airplanes


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47-06-09 BEECH: (Was Mandatory Note 1 of AD-2-582-2 and Mandatory Note 4 of AD-757-2.) Applies to All AT-11 and C18S Airplanes Equipped With 33-Inch Tires.

Compliance required at next periodic inspection.

To prevent collapse of the landing gear due to cracking of the shock cylinder retracting leg attachment lugs or failure of the retracting legs the following items should be complied with:

(1) Check the rear leg and lug lengths to ascertain whether they have been previously modified. Rear legs (Beech P/N 18820) 22 7/8 inches between hole centers should be installed only with cylinders having original lugs (approximately 1 7/8 inches from centerline of holes to outside of cylinder wall). Rear legs 23 19/64 inches between hole centers should be installed only with cylinders having short modified lugs (approximately 7/8 inch from centerline of holes to outside of cylinder wall). Legs 23 19/64 inches long with a 1 3/4 inches diameter reinforcing tube welded to the original ends should be replaced with Beech P/N 804-188416.

(2) Inspect the shock cylinder lugs for cracks. If cracks are found in the lugs either the cylinder must be replaced or the cracks repaired. Contact FAA, Kansas City, MO., for repair methods.

(Beech Service Bulletin C18-6 covers this same subject.)



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