Airworthiness Directives (ADs)
CAA-2010-12-010
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
- 2010/12/31
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Applicability
- Model S-76A, B, and C helicopters, with LITEF LCR-100, Attitude Heading and Reference System (AHRS) Unit, part number (P/N) 145130-7100, installed, certificated in any category.
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Model Number
- Sikorsky Aircraft Corporation (Sikorsky) Model S76A, B, and C Helicopters
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CAA AD Number
- CAA-2010-12-010
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Aeronautics Authority of Original AD
- FAA
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Original AD Number
- 2010-26-09
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Effective Date
- 2011/01/12
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Subject
- This AD was prompted by the need to supersede the EAD to state the distinction between IFR and IMC as used in the operating limitations and to reduce the airspeed to 120 KIAS if both autopilots uncouple during IMC or night flight. The actions specified by this AD are intended to implement operating limitations based on an anomaly in the AHRS related to the 26 volt AC inverter that could result in a decoupling of both autopilots and to prevent loss of control of the helicopter during IMC and during night flight.
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Reference Publications (Revision/ATA/SB)
- This supersedes an existing emergency airworthiness directive (EAD) No. 2010-11-52(CAA-2010-05-007).Ref:Sikorsky Alert Service Bulletin No. 76-34-11.
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Remarks
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