CTHIn ForceLegislation
AD/GBK 117/7 Amdt 1 Retrofit of Engine Overspeed Controller
Airbus Helicopters Deutschland (EurocoptAirbus Helicopters Deutschland (Eurocopter) MBB-BK 117 Series Helicopters
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Airbus Helicopters Deutschland (Eurocopter) MBB-BK 117 Series Helicopters
| AD/GBK 117/7 Amdt 1 | Retrofit of Engine Overspeed Controller | 16/2021 |
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| Applicability: | All Airbus Helicopters Deutschland (formerly Eurocopter) BK 117 series helicopters fitted with Honeywell International (formerly AlliedSignal and Textron Lycoming) LTS101-650B1 or LTS101-750B1 model engines that have been subject to Honeywell International Service Bulletin (SB) LTS 101B-73-10-0127 Revision 2, as in force on the commencement date of this AD. |
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| Requirement: | To prevent a power turbine overspeed and an uncontained engine failure, comply with the wiring and associated hardware installation requirements detailed in Airbus Helicopters Deutschland Service Bulletin SB-MBB-BK 117-90-103 Revision 1, as in force on the commencement date of this AD.Note 1: CASA Airworthiness Directive (AD) AD/LTS/13 Amdt 1 relates to this AD.Note 2: United States of America Federal Aviation Administration (FAA) AD 95‑26‑01 is the basis of this AD. |
| Compliance: | Concurrent with Requirement 2 of AD/LTS/13 Amdt 1, as in force from time to time, but before further flight after the commencement date of this AD, unless accomplished previously. |
| This AD commences on 20 August 2021. | |
| Background: | This directive has been issued to require the wiring and associated hardware modifications necessary to permit the incorporation of an electronic engine overspeed controller. The requirement, in conjunction with AD/LTS/13 Amdt 1, addresses reports of uncontained power turbine overspeed events.Amendment 1 of this AD removes obsolete references and makes minor editorial changes to reflect current requirements. |
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David Punshon
Delegate of the Civil Aviation Safety Authority
9 August 2021