67-01-01 BRITISH AIRCRAFT: Amdt. 39-321 Part 39 Federal Register December 16, 1966. Applies to Model BAC 1-11 200 and 400 Series Airplanes.
Compliance required as directed.
To prevent fatigue failures of the flap carriage links, accomplish the following until links, P/N AB09 A943, are replaced with modification PM 2245 links, P/N AB09 A3657:
(a) For 200 Series airplanes having No. 1 flap links with less than 2,500 landings on the effective date of this AD, remove links from service before the accumulation of 3,000 landings.
(b) For 200 Series airplanes having No. 1 flap links with 2,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(c) For 200 Series airplanes having No. 2 flap links with less than 11,500 landings on the effective date of this AD, remove links from service before the accumulation of 12,000 landings.
(d) For 200 Series airplanes having No. 2 flaplinks with 11,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(e) For 200 Series airplanes having No. 3 flap links with less than 23,500 landings on the effective date of this AD, remove links from service before the accumulation of 24,000 landings.
(f) For 200 Series airplanes having No. 3 flap links with 23,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(g) For 400 Series airplanes having No. 1 flap links with less than 1,500 landings on the effective date of this AD, remove links from service before the accumulation of 2,000 landings.
(h) For 400 Series airplanes having No. 1 flap links with 1,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(i) For 400 Series airplaneshaving No. 2 flap links with less than 7,500 landings on the effective date of this AD, remove links from service before the accumulation of 8,000 landings.
(j) For 400 Series airplanes having No. 2 flap links with 7,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(k) For 400 Series airplanes having No. 3 flap links with less than 15,500 landings on the effective date of this AD, remove links from service before the accumulation of 16,000 landings.
(l) For 400 Series airplanes having No. 3 flap links with 15,500 or more landings on the effective date of this AD, remove links from service within the next 500 landings after the effective date of this AD.
(m) 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 fleet average time from takeoff to landing for the airplane type.
(British Aircraft Corporation (Operating) Ltd. (Weybridge Division), Alert Service Bulletin No. 27-A-PM2245 pertains to this subject.)
This directive effective January 15, 1967.