70-07-06 HAWKER SIDDELEY: Amdt. 39-963. Applies to Models DH-104 "Dove" and DH-114 "Heron" airplanes.
Within the next 25 hours' time in service after the effective date of this AD, accomplish the following:
(a) Conduct an x-ray inspection of the two tailplane rear spar to rear fuselage bulkhead support struts for internal corrosion.
(b) If corrosion is found during the inspection required by paragraph (a), before further flight replace each strut found corroded with a serviceable strut of the same part number.
(c) Within 30 days after completing the inspection required by paragraph (a), report the results of the inspection, negative or positive, to the Chief, Engineering and Manufacturing Branch, Aeronautical Center, AC-210, Federal Aviation Administration, Oklahoma City, Oklahoma 73125.
(Reporting approved by Bureau of Budget under BOB No. 04-RO 174).
This amendment is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram dated 4 March, 1970, which contained this amendment.