68-26-05 VICKERS VISCOUNT: Amendment 39-699. Applies to Vickers Viscount Models 744, 745D and 810 Series Airplanes.
Compliance required as indicated.
To prevent fatigue failure of engine nacelle cross beam attachment eye end fittings P/N 70116-383/384 or 80203-1719/1720 or 81003/1415/1416 located on the lower surface of the inner wing station 96 and P/N 70116-385/386 or 80203-1721/1722 or 81003-1417/1418 located on the lower surface of the inner wing station 143, accomplish the following:
(a) For cross beam attachment eye end fittings located at wing station 96 that have accumulated 7700 or more landings on the effective date of this AD, inspect in accordance with paragraph (c) within the next 300 landings after the effective date of this AD, unless already accomplished within the last 450 landings, and thereafter at intervals not to exceed 1000 landings from the last inspection.
(b) For cross beam attachment eye end fittings located at wing station 96 that have accumulated less than 7700 landings on the effective date of this AD, inspect in accordance with paragraph (c) prior to the accumulation of 8000 landings, unless already accomplished within the last 450 landings, and thereafter at intervals not to exceed 1000 landings from the last inspection.
(c) Visually inspect the fittings for cracks or fractures in accordance with British Aircraft Corporation Preliminary Technical Leaflet No. 273, Issue 1 (700 Series) or No. 137, Issue 1 (800/810 Series) or later ARB approved issues or an FAA approved equivalent.
(d) If cracks are detected during the inspection specified in paragraph (c), within the next 200 landings replace the fittings in accordance with paragraph (f).
(e) If a fracture is found during the inspection specified in paragraph (c), before further flight replace the fittings in accordance with paragraph (f) and visually inspect the eye end fittings at wing station 143 within the next 500 landings and replace any cracked fitting with a fitting of the same part number within the next 100 landings.
(f) Replace eye end fittings and the mating fork end fittings P/N 70116-387 or 80216-259 or 81016-695 with fittings of the same part numbers or replace the eye end fittings with P/N 81003-2643/2644 and the fork end fitting with P/N 81016-1675 in accordance with British Aircraft Corporation Modification Bulletin No. D-3215 dated May 14, 1968, or FG.2091 dated May 14, 1968 or later ARB approved issues or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa and Middle East Region.
(g) The repetitive inspections required in this AD may be discontinued following incorporation of the applicable modification in accordance with paragraph (f) of this AD.
(h) For the purpose of complying with this AD, subject to acceptance by the assigned FAA Maintenance Inspector, the number of landings may be determined by dividing each airplane's hours time in service by the operator's fleetaverage time from takeoff to landing for the airplane type.
This amendment becomes effective on January 19, 1969.