COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Beechcraft 60 (Duke) Series Aeroplanes

AD/BEECH 60/14

Amdt 1

Applicability: All models.

Main Undercarriage Up-Lock 7/72

Requirement: 1. Modify the LH and RH main landing gear up-lock roller assemblies by fitting a lubricating bolt assembly as detailed in Beechcraft SI No. 0482-211, or by a scheme approved by the Secretary.

2.    Inspect the up-lock spring for over extension. Free length (measured inside loops) shall be between 3.70 inches and 3.82 inches; deflected length with a 20 lb. load applied shall be between 6.83 inches and 7.81 inches. Any spring outside these limits shall be discarded.

3.    Inspect the up-lock roller for stiction and/or roughness. It is essential that the roller rotates under light finger pressure.

4.    Lubricate up-lock roller bearing with grease to Spec MIL-G-23827, Spec MIL-G- 7711A or equivalent.

5.    Inspect the up-lock block for alignment in the up-lock bracket, even contour and freedom from corrosion and/or damage.

Compliance: For Para. 1 - Within 100 hours’ time in service or 2 months after 1 March 1972 whichever occurs first.

For Para. 2 - On each occasion the up-lock bracket or spring is removed. For Para. 3 - (a) At any time main wheel bay is washed out.

(b)     Before flight when operating from wet, muddy or dusty terrain.

(c)     At intervals not exceeding 50 hours’ time in service or 2 months whichever occurs first.

For Para. 4 - (a) At any time main wheel bay is washed out.

(b)     At any time stiction and/or roughness is detected in roller.

(c)     At intervals not exceeding 50 hours’ time in service or 2 months whichever occurs first.

For Para. 5 - At intervals not exceeding 100 hours’ time in service or 12 months whichever occurs first.

Note: Certification for items 3 and 4 may be made by pilot.