79-13-09 GENERAL ELECTRIC: Amendment 39-3508. Applies to General Electric Model CF6-50 series engines containing stage 3-9 high pressure compressor rotor spools P/N 9081M49 (serial numbers as specified in the body of this AD) installed in, but not limited to certain McDonnell Douglas DC-10, Boeing 747, and Airbus Industries A-300 series aircraft certificated in all categories. Due to design differences, this AD does not affect CF6-6 series engines.
Compliance required within the next 30 calendar days after the effective date of this AD, unless previously accomplished.
To preclude possible engine failure resulting from compressor rotor spool fatigue cracking, remove from service stage 3-9 high pressure compressor rotor spools P/N 9081M49, Serial Numbers A0436, A0570, A0581, A0590, A0432 and A0443.
This amendment becomes effective upon publication in the Federal Register.