AD 2019-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab | AB | Airworthiness Directives; Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems) Airplanes |
Unsafe Condition
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), 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.
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Required Actions
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, within 3,000 flight hours or 24 months, whichever occurs first after the effective date of this AD.
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Compliance Time
Within 3,000 flight hours or 24 months, whichever occurs first after the effective date of this AD.
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Affected Aircraft
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.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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