AD 81-04-09

81-04-09 SHORT BROTHERS LIMITED: Amendment 39-4047. Applies to Model SD3-30 airplanes, certificated in all categories, which have Menasco nose landing gear steering actuator, P/N 18002, serial numbers MMC-003 through MMC-048, and/or nose landing gear beam assembly, P/N 18004, serial numbers MMC-001 through MMC-041, installed.

Compliance is required as indicated unless already accomplished.

To prevent failure of the end cap sub-assembly of the nose wheel steering actuator, or of the link sub-assembly of the nose landing gear beam, accomplish the following:

(a) Within the next 25 landings after the effective date of this AD, or prior to accumulation of 10,500 landings, whichever occurs later, replace the end cap sub-assembly, P/N 18382-7A or P/N 18391-7A, of nose landing gear steering actuator assembly, P/N 18002, with end cap, P/N 18382-9 or P/N 18391-9, in accordance with Menasco Manufacturing Service Bulletin 32-21, Revision 3, dated August 7, 1979, or an FAA-approved equivalent.

(b) Within the next 25 landings after the effective date of this AD, or prior to the accumulation of 10,000 landings, whichever occurs later, replace in accordance with Menasco Manufacturing Service Bulletin 32-30, dated February 9, 1979, or an FAA-approved equivalent, the link sub-assembly, P/N 18053-1 or P/N 18053-3 as appropriate, with a link sub-assembly of the same part number, and continue replacement at intervals not to exceed 10,000 landings; or replace with link sub-assembly P/N 18293-1, in which case no further replacement is required and reidentify the nose landing gear beam assembly, P/N 18004, in accordance with paragraph 10D of Menasco Service Bulletin 32-30, dated February 9, 1979, or an FAA-approved equivalent.

(c) If an equivalent means of compliance is used in complying with this AD, that equivalent must be approved by the Chief, Aircraft Certification Staff, AEU-100, Federal Aviation Administration, Europe, Africa, and Middle East Office, Brussels, Belgium.

This amendment becomes effective March 3, 1981.