AD 80-13-51

80-13-51 GROUPEMENT d'INTERET ECONOMIQUE AIRBUS INDUSTRIE (AIRBUS): Amendment 39-4010. Applies to Model A300B4-103 airplanes modified in accordance with Airbus Mod. 2150, certificated in all categories.

Compliance required as indicated, unless already accomplished.

To prevent possible operation at degraded performance levels due to inaccurate performance data presented in the airplane flight manual (AFM), accomplish the following:

(a) Prior to further flight, except that the airplane can be ferried in accordance with FAR Sections 21.197 and 21.199 to a place where replacement can be made, if CF-6-50C or CF- 6-50C1 engines are installed, replace with serviceable CF6-50C2 engines, and

(b) Within 20 hours time in service after the effective date of this AD, incorporate Airbus Industrie A300B4-103 AFM, Revision 6, dated May 28, 1980, or an FAA-approved equivalent, into the airplane flight manual and operate the airplane accordingly.

(c) If an equivalent meansof compliance is used in complying with this AD, that equivalent must be approved by the Chief, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, c/o American Embassy, Brussels, Belgium.

This amendment becomes effective January 2, 1981, as to all persons except those persons to whom it was made immediately effective by telegraphic AD T80-13-51, issued June 18, 1980, which contained this amendment.