75-17-02 BRITISH AIRCRAFT CORPORATION: Amendment 39-2304. Applies to BAC Viscount Model 700 and 810 series airplanes.
Compliance is required as indicated.
To prevent high resistance at aluminum cable assembly terminations rated at 35 amperes and above, and at generator main ground cable assembly terminations, accomplish the following:
(a) Within the next 500 hours' time in service, or 6 months after the effective date of this AD, whichever occurs sooner, and thereafter at intervals not to exceed 3 years from the date of the last inspection, inspect all aluminum cables and cable assemblies rated at 35 amperes and above, except generator main ground cable assemblies, for overheating, corrosion, cable conductor strand fracture, and loose bolted joints, in accordance with BAC Alert PTL No. 289, dated July 12, 1972 (700 Series), and BAC Alert PTL No. 157, dated July 12, 1972 (810 Series), or FAA-approved equivalents, respectively.
(b) If cables or cable assemblies are found to be overheated, or corroded, or to have cable conductor strand fractions, or loose bolted joints during an inspection required by paragraph (a), before further flight, repair in accordance with BAC Alert PTL No. 289, dated July 12, 1972 (700 Series), and BAC Alert PTL No. 157, dated July 12, 1972 (810 series), or FAA-approved equivalents, respectively, or replace with an equivalent new cable or cable assembly.
(c) Within the next 500 hours time in service or 6 months after the effective date of this AD, whichever occurs sooner, and thereafter at intervals not to exceed 1 year from the date of the last inspection, inspect all generator main ground cable assemblies for overheating, corrosion, cable conductor strand fracture, and loose bolted joints, in accordance with BAC Alert PTL No. 288, dated July 12, 1972 (700 Series), and BAC Alert PTL No. 156 dated July 12, 1972 (810 Series), or FAA-approved equivalents, respectively.
(d) If generator main ground cable assemblies arefound to be overheated, or corroded, or to have cable conductor strand fractures, or loose bolted joints during an inspection required by paragraph (c), before further flight, repair in accordance with BAC Alert PTL No. 288, dated July 12, 1972 (700 Series), and BAC Alert PTL No. 156, dated July 12, 1972 (810 Series), or FAA-approved equivalents, respectively, or replace with an equivalent new cable assembly.
(e) Before the accumulation of 3 years total time in service, or within the next year after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 5 years, replace generator main ground cable assemblies with serviceable cable assemblies that comply with the same standard.
This amendment becomes effective August 15, 1975.