64-13-01 de HAVILLAND: Amdt. 739, Part 507, Federal Register May 27, 1964. Applies to All Model 104 "Dove" Aircraft.
Compliance required as indicated.
To prevent overheating of the electric cables in the cockpit and fuselage nose areas caused by a high resistance ground at the main ground post, accomplish either (a) or (b) as follows:
(a) If the main ground (earth) has not been removed and inspected within 12 months prior to January 8, 1964, accomplish the provisions of paragraph (c) within the next 200 hours' time in service after the effective date of this AD unless already accomplished.
(b) If the main ground (earth) has been removed and inspected within the 12 months prior to January 8, 1964, accomplish the provisions of paragraph (c) within the next 300 hours' time in service after the effective date of this AD unless already accomplished.
(c) Dismantle, clean, inspect, and reassemble the main ground (earth) assembly in the forward fuselage in accordance with the method described in Hawker Siddeley Aviation, de Havilland Division, T.N.S. CT (104) No. 186, or an equivalent method approved by the Chief, Aircraft Certification Division, Europe, Africa, and Middle East.
This directive effective June 26, 1964.