Airworthiness directives › 2019-21-04
AD 2019-21-04 Airworthiness Directives; Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems) Airplanes
Models named: SAAB 2000. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Saab AB, Saab Aeronautics (formerly known as Saab AB, Saab Aerosystems) Model SAAB 2000 airplanes, certificated in any category, all serial numbers, except serial numbers 006, 043, 056, and 061.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 3,000 flight hours or 24 months, whichever occurs first after the effective date of this AD, modify the EMS and structural attachments, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-54-036, Revision 02, dated January 18, 2019. Where Saab Service Bulletin 2000-54-036, Revision 02, dated January 18, 2019, specifies to contact Saab for appropriate action: Before further flight, accomplish corrective actions in accordance with the procedures specified in paragraph (i)(2) of this AD.
Unsafe condition
This AD was prompted by reports of loose and irregular fasteners at the forward end of the nacelle upper longeron, where the bulkhead frame and struts are attached to the engine mounting structure (EMS). The FAA is issuing this AD to address loose and irregular fasteners of the EMS which could cause development of cracks in the EMS, leading to failure of the affected engine mount-to-airplane structural connection, possibly resulting in significant airframe vibrations and detrimental effects on the surrounding pylon/nacelle structure, and loss of structural integrity.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1