84-19-07 BRITISH AEROSPACE VISCOUNT: Amendment 39-4918. Applies to Model 700 and 800 series airplanes, certificated in all categories, as indicated in each paragraph below. To prevent failure of certain components in the hydraulic system, entry and cargo doors, or rudder mechanism, accomplish the following within the compliance time specified in each paragraph below, unless previously accomplished:
A. For all Model 700 series pre-Modification D.2883 and for all Model 800 series pre-Modification FG.1553 which are equipped with hydraulic system Micronic Filters, Part Numbers A6301, A6302, or A5641, inspect and replace hydraulic filter attachment bolts in accordance with Preliminary Technical Leaflet (PTL) No. 308 for all Model 700 series and PLT No. 177 for all 800 series airplanes, both dated February 7, 1979, within 1000 hours time in service after the effective date of this AD.
B. Inspect and modify entrance and cargo doors of Model 700 series airplanes in accordancewith PTL No. 235, Issue 3, dated December 8, 1968, within 350 hours time in service after the effective date of this AD. Subsequent inspections, as denoted in paragraph 4.2 of the PTL, must be accomplished at intervals not to exceed 350 hours from the previous inspection. Modify Model 700 series airplanes in accordance with the instructions in BAe bulletin for Modification No. D.3051, Issue 1, dated April 23, 1962, and Issue 2, dated May 17, 1978, within 350 hours time in service after the effective date of this AD, for all entrance and cargo door bolt sleeves.
C. Replace rudder spigot and mounting block on Model 700 series and Model 800 series airplanes in accordance with PTL No. 311, Issue 1, and PTL No. 180, Issue 1, respectively, both dated May 22, 1981, at or before 29,500 hours total time in service or within the next 500 hours after the effective date of this AD, whichever occurs later.
D. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.
E. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and modifications required by this AD.
This amendment becomes effective October 22, 1984.