The FAA has issued new and revised guidance to the aviation industry regarding development and implementation of Airworthiness Directives (ADs). Details on the new guidance were published in an FAA Special Airworthiness Information Bulletin (SAIB NM-11-53).
Effective yesterday, an EASA Airworthiness Directive (AD) has restored the full original flight envelope for the Dassault Falcon 7X, providing the fly-by-wire control system is updated. Dassault has developed a modification of the system to improve “the monitoring and reversion logic of the horizontal stabilizer trim system,” EASA said.
The EASA today grounded the Dassault Falcon 7X, via an emergency Airworthiness Directive, following a runaway pitch trim event experienced in one of the trijets yesterday during descent. According to the EASA, the crew successfully recovered the aircraft to a stable flight profile and performed an uneventful landing.
The FAA is seeking comments on a proposed legal interpretation of Airworthiness Directive (AD) regulations. The interpretation comes from the FAA’s Organization/Procedures Working Group of the Airworthiness Directive Implementation Aviation Rulemaking Committee (ARC). Issues identified by the ARC are mostly a result of the FAA’s 2002 plain-language revision of 14 CFR Part 39, which governs the AD process.
One of the problems with the aviation rulemaking committee (ARC) process is that it gives people, and especially FAA lawyers, too much time to think. And too much thinking often leads to onerous interpretations of what seem like simple regulations.
India’s civil aviation authority, the DGCA, is considering grounding all civil Hindustan Aeronautics Limited (HAL) Dhruv light twin helicopters until the airframe is modified around the intermediate gearbox (IGB) in the tailfin. In some helicopters, “Cracks were observed on the rib bottom of the IGB and the associated area of the fin torsion box assembly,” according to a recently proposed Airworthiness Directive.
The FAA issued an Airworthiness Directive today for the Eclipse 500 that, as of March 21, would limit its maximum operating altitude to 30,000 feet.
The FAA issued an emergency Airworthiness Directive (AD)-2011-01-53 on December 20 to owners and operators of the Piaggio Avanti twin turboprop. The AD supersedes AD 2011-01-51, issued December 18.
A proposed FAA Airworthiness Directive targets the Embraer Phenom 100’s angle-of-attack (AOA) system. The FAA believes the accumulation of moisture between the AOA vane base assembly and the stationary ring of the sensor’s body can freeze under certain conditions.
United Airlines says it expects “minimal disruption” today resulting from its grounding of its 96 Boeing 757s after a check of maintenance records showed that the airline did not fully comply with a 2004 FAA Airworthiness Directive. A United spokesman told AIN today that the groundings resulted in about 15 flight cancellations, mainly last night.