AD 75-24-10

75-24-10 HAWKER SIDDELEY AVIATION LIMITED: Amendment 39-2433. Applies to DH-114 "Heron" airplanes, Serial Numbers up to and including 14093 and Serial Number 14098, certificated in all categories, which have not been altered in accordance with Hawker Siddeley Modification 843.

Compliance is required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent failure of the wing structure, accomplish the following:

(a) Inspect the inboard sections of the left and right wing main spar upper and lower flanges for cracks in accordance with the X-ray technique described in Appendix I, Issue 2, as amended June 16, 1975, of Hawker Siddeley Technical News Sheet (T.N.S.) No. W.6, Issue 3, dated March 17, 1975, or an FAA-approved equivalent inspection.

(b) If any cracks are detected in a spar joint as a result of the inspection required by paragraph (a) of this AD, before further flight, repair the joint in accordance with the appropriate part of Appendix 2 of Hawker Siddeley Technical News Sheet (T.N.S.) No. W. 6, Issue 3, dated March 17, 1975, or an FAA-approved equivalent.

(c) Upon compliance with paragraph (a) of this AD, it is requested that copies of the X-rays or of the results of the FAA-approved equivalent inspection be forwarded to DOT/FAA, Chief, Aircraft Certification Staff, Europe, Africa, and Middle East Region, c/o American Embassy, APO New York, N.Y. 09667.

(Reporting approved by the Bureau of the Budget under B.O.B. No. 04-RO174).

This amendment becomes effective December 1, 1975.