Airworthiness directives › 2020-18-51
AD 2020-18-51 Airworthiness Directives; Sandia Attitude Indicators
Applicability*9
This AD applies to Sandia attitude indicator (attitude indicator) part number 306171-10 and 306171-20. These attitude indicators may be marked as BendixKing Model KI-300 or Sandia Model SAI-340A. They may be installed on airplanes certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Before further flight, revise the limitations section of the existing Airplane Flight Manual for your airplane by inserting a copy of this AD or by making pen and ink changes to add: (i) “Operation under Instrument Flight Rules or night Visual Flight Rules is prohibited.” (ii) “Coupling the autopilot with Sandia attitude indicator part number 306171-10 or 306171-20 is prohibited. These attitude indicators may be marked as BendixKing Model KI 300 or Sandia Model SAI 340A.” (2) The action required by paragraph (g)(1) of this AD may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9(a)(1) through (4) and 14 CFR 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417. This authority is not applicable to aircraft being operated under 14 CFR part 119.
Unsafe condition
This AD was prompted by reports of 54 failed attitude indicators, which produced erroneous attitude data to the pilot and autopilot, if equipped. The FAA is issuing this AD to prevent aeronautical decision-making based on erroneous attitude information, which may result in loss of control of the airplane.
Affected ADs
None.
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