Airworthiness Directives (ADs)
CAA-2010-01-006
The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.
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Issue Date
- 2010/01/17
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Applicability
- (1) CFM International, S.A. CFM56-7B20; -7B22; -7B24; -7B26; -7B27; -7B22/B1; -7B24/B1; -
7B27/B1; -7B26/B1; -7B20/3; -7B22/3; -7B24/3; -7B26/3; -7B27/3; -7B22/3B1; -7B24/3B1; -
7B27/3B1; -7B26/3B1; -7B26/3F; -7B27/B3; -7B27/3F; -7B27/3B1F; and -7B27/3B3 turbofan
engines assembled with a low-pressure (LP) turbine rear frame, part number (P/N) 340-166-254-0;
340-166-255-0; 340-166-256-0; 340-166-257-0; 340-166-258-0; or 340-166-259-0; and
(2) CFM International, S.A. CFM56-7B20/2; -7B22/2; -7B24/2; -7B26/2; and -7B27/2 turbofan
engines assembled with a dual annular combustor and an LP turbine rear frame, P/N 340-177-551-0;
340-177-552-0; 340-177-553-0; 340-177-554-0; 340-177-555-0; or 340-177-556-0.
(3) These engines are installed on, but not limited to, Boeing 737-600, 737-700, 737-800, and
737-900 series airplanes.
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Model Number
- CFM International, S.A. CFM56-7B Series Turbofan Engines
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CAA AD Number
- CAA-2010-01-006
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Aeronautics Authority of Original AD
- FAA
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Original AD Number
- 2010-01-05
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Effective Date
- 2010/02/18
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Subject
- To prevent failure of the LP turbine rear frame from low-cycle-fatigue cracks. Failure of the LP
turbine rear frame could result in engine separation from the airplane, possibly leading to loss of
control of the airplane.
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Reference Publications (Revision/ATA/SB)
- CFM56-7B S/B 72-0558,R3 and CFM56-7B S/B 72-0579 R5.
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Remarks
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