Airworthiness Directives; Agusta S.p.A. (Agusta) Model AB139 and AW139 Helicopters
type: Action
additional type: https://schema.org/LegalForceStatus
description: This amendment adopts a new airworthiness directive (AD) for the specified Agusta model helicopters. This action requires inspecting certain modules and related connectors for corrosion. If there is corrosion on the connectors, this AD requires cleaning the connectors before further flight. If there is corrosion on a module, before further flight, this AD requires replacing the module with an airworthy module. This AD also requires modifying the Number 2 Modular Avionic Unit (MAU) ventilation duct. This amendment is prompted by some in- flight emergencies due to internal corrosion of the MAU circuit card assemblies. The actions specified in this AD are intended to detect corrosion of certain modules to prevent the display of misleading data to the flight crew, disengagement of the flight director modes of the autopilot or other alert system, increased workload of the flight crew, and subsequent loss of control of the helicopter.
date published: 2011-11-04
start time: 2011-11-21
agent: Federal Aviation Administration
  type: GovernmentOrganization
  parent organization: US Department of Transportation
object: Agusta S.p.A. (Agusta) Model AB139 and AW139
citation: DigitalDocument
license: https://creativecommons.org/publicdomain/zero/1.0/
source: https://www.federalregister.gov/documents/2011/11/04/2011-27772/airworthiness-directives-agusta-spa-agusta-model-ab139-and-aw139-helicopters
source organization: US Federal Register
publisher: AI Analytics

PropertyValue
property ID: Federal Register Document Number
value: 2011-27772

PropertyValue
property ID: Federal Register Citation
value: 76 FR 68297

PropertyValue
property ID: FAA Docket
value: Docket No. FAA-2011-1036

AI Analytics
type: Organization