Airworthiness Directive · Amendment 39-19521 · Flight controls
Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems) Airplanes
This AD applies to Saab AB, Saab Aeronautics (formerly known as Saab AB, Saab Aerosystems) Model SAAB 2000 airplanes, certificated in any category, all manufacturer serial numbers.
We are superseding Airworthiness Directive (AD) 2018-11-07, which applied to all Saab AB, Saab Aeronautics Model SAAB 2000 airplanes. AD 2018-11-07 required a one-time inspection of an affected lug attaching the aileron bellcrank support bracket to the rear spar of the wing and the adjacent area of the installed support brackets, a thickness measurement of the affected lug, repetitive inspections of the affected aileron bellcrank support brackets, and corrective actions if necessary. AD 2018-11-07 also provided an optional terminating action for the repetitive inspections. This AD retains the actions of AD 2018-11-07 and requires the terminating action for the repetitive inspections. This AD was prompted by a determination that it is necessary to require the terminating action. We are issuing this AD to address the unsafe condition on these products.
(1) This paragraph restates the definition specified in paragraph (g)(1) of AD 2018-11-07, with no changes. For the purposes of this AD, affected support brackets are aileron bellcrank support brackets, part number (P/N) 7327993-813 and P/N 7327993-814, for which it has been determined that the affected lug attaching the support bracket to the rear spar of the wing has a thickness of less than 2.75 millimeters (mm) (0.108 inch (in.)), as specified in Saab Service Bulletin 2000-27-056, dated April 18, 2018.
(2) This paragraph restates the definition specified in paragraph (g)(2) of AD 2018-11-07, with no changes. For the purposes of this AD, serviceable support brackets are aileron bellcrank support brackets, P/N 7327993-813 and P/N 7327993-814, for which it has been determined that the affected lug attaching the support bracket to the rear spar of the wing has a thickness of 2.75 mm (0.108 in.) or more, as specified in Saab Service Bulletin 2000-27-056, dated April 18, 2018.
This paragraph restates the requirements of paragraph (h) of AD 2018-11-07, with no changes. Within 100 flight cycles or 30 days, whichever occurs first after June 13, 2018 (the effective date of AD 2018-11-07), accomplish a detailed visual inspection for cracks, corrosion, and damage (including missing paint) of the affected lug and the adjacent area of the aileron bellcrank support brackets installed on the left-hand (LH) and right-hand (RH) wings, and measure the thickness of the affected lug attaching the aileron bellcrank support bracket to the rear spar of the wing, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-27-056, dated April 18, 2018.
This paragraph restates the requirements of paragraph (i) of AD 2018-11-07, with no changes. If, during the measurement required by paragraph (h) of this AD, it is determined that the affected lug attaching the aileron bellcrank support bracket to the rear spar of the wing has a thickness of less than 2.75 mm (0.108 in.), at intervals not to exceed 100 flight cycles, accomplish a detailed visual inspection for cracks, corrosion, and damage (including missing paint) of that affected support bracket in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-27-056, dated April 18, 2018. Accomplishing the replacement specified in paragraph (l) of this AD terminates the repetitive inspections required by this paragraph for that bracket.
This paragraph restates the requirements of paragraph (j) of AD 2018-11-07, with no changes. If, during any inspection required by paragraph (h) or (i) of this AD, any crack, corrosion, or damage (including missing paint) is found, before further flight, obtain corrective actions instructions approved by the Manager, International Section, Transport Standards Branch, FAA; or the European Aviation Safety Agency (EASA); or Saab AB, Saab Aeronautics' EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. Accomplish the corrective actions within the compliance time specified therein. If no compliance time is specified in the corrective actions instructions, accomplish the corrective action before further flight.
This paragraph restates the requirements of paragraph (m) of AD 2018-11-07, with no changes. As of June 13, 2018 (the effective date of AD 2018-11-07), it is allowed to install on any airplane an aileron bellcrank support bracket P/N 7327993-813 or P/N 7327993-814, provided it is a serviceable support bracket.
Within 6 months after the effective date of this AD, replace each affected support bracket with a serviceable support bracket, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-27-056, dated April 18, 2018. Replacing each affected support bracket terminates the inspections required by paragraph (i) of this AD for that airplane.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
