Harmonization of Airworthiness Standards: Miscellaneous Structures and Gust and Maneuver Load Requirements


Instructor: Mont Smith
Product ID: 703607

  • Duration: 90 Min
This webinar will help participants understand the need for global harmonization of aircraft certification requirements. It will discuss proof of structure, casting and operational test criteria among other key elements.
Last Recorded Date: Sep-2014


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Why Should You Attend:

FAA tasked the Aviation Rulemaking Advisory Committee (ARAC) through the Loads and Dynamics Harmonization Working Group (LDHWG) and the General Structures Harmonization Working Group (GSHWG) to review existing structures regulations and recommend changes that would eliminate differences between the U.S. and European airworthiness standards, while maintaining or improving the level of safety in the current regulations. This proposed rule is a result of this harmonization effort.

This webinar will help attendees understand the impact of changes to commercial transport aircraft certification process involving gust and maneuver load design and performance requirements. It will also discuss topics such as symmetric maneuvering conditions, structural failures that result in extensive engine damage and permanent loss of thrust-producing capability, and much more.

Areas Covered in the Webinar:

  • "Proof of structure" criteria
  • Casting criteria
  • Operational test criteria
  • Landing gear robustness criteria
  • Stowage compartment /fuel tank integrity criteria
  • Fuel component robustness criteria during wheels up landing
  • Symmetric maneuvering conditions
  • Gust and turbulence loads
  • Design envelope analysis vs. mission analysis methodology
  • Turbulence intensity criteria taking into account in-service measurements of derived gust intensities
  • Evaluation of discrete gust conditions at airplane speeds from VB to design cruising speed, VC
  • Expanded definition of gust speeds up to 60,000 feet
  • Specification of a “round-the-clock” and a multi-axis discrete gust criterion for airplanes with wing-mounted engines
  • Revised material pertaining to design fuel and oil loads, high lift devices, gyroscopic loads, speed control devices and control surface loads under continuous and discrete load conditions
  • Engine failure loads revised to add engine loads design requirements for engine mounts, auxiliary power unit mounts, engine pylons, and adjacent supporting airframe structures
  • Design of engine mounts and supporting airframe structure for 1g flight loads
  • Sudden deceleration events involving transient deceleration conditions and rapid slowing of the rotating system that often result in some engine distress
  • Structural failures that result in extensive engine damage and permanent loss of thrust-producing capability
  • Dynamic amplification effects in consideration of static design loads due to ground gusts
  • "Rough Air Speed" VRA vs. V B "design speed for maximum gust intensity" and maximum operating limit speed, VMO
  • Advisory material

Who will Benefit:

  • Safety Managers (manufacturers and airlines)
  • Structural and Powerplant Engineering Managers
  • FAA Safety Inspectors
  • Airline Association and Pilot Association Technical Specialists
  • Aircraft Engineering Managers

Instructor Profile:

Mont Smith,is an aviation safety compliance expert with 40 years of experience in military, general and commercial aviation. Mr. Smith holds a Bachelor of Science degree from the U.S. Coast Guard Academy in New London, Connecticut and a Master’s Degree in Aeronautical Systems from the University of West Florida in Pensacola, Florida. He attended the Safety Officer Certificate Course at the University of Southern California and the Crash Survival Investigator Certificate Course at Arizona State University in Phoenix, Arizona. As the prospective commanding officer of Coast Guard Air Station Kodiak, Alaska, he attended the Aviation Command Safety Course at the Naval Postgraduate School, Monterey, California.

After retirement from the Coast Guard, Mr. Smith flew an emergency medical services helicopter for Mercy Air Hawaii for three years. Employed by Hawaiian Airlines as senior director, safety and compliance, Mr. Smith served for five years in this capacity during a period of rapid expansion of the airline. He subsequently served as the director of safety for the Air Transport Association (now named “Airlines for America”) where he facilitated the 23-airline Safety Council, Flight Safety Committee, Ground Safety Committee, A4A/Airline/OSHA Alliance.

Mr. Smith has received letters of appreciation from the Federal Aviation Administration and the Airline Pilots Association. He holds the Air Transport Pilot (ATP) rating in both landplane/multi-engine and rotorcraft/helicopter with type ratings in the Gulfstream I executive transport, Lockheed Hercules turboprop cargo aircraft, Dassault-Breguet Falcon 200 jet, and Sikorsky S-61 heavy lift helicopter.

Topic Background:

The FAA proposes to amend certain airworthiness regulations for transport category airplanes based on recommendations from the Aviation Rulemaking Advisory Committee (ARAC) through the Loads and Dynamics Harmonization Working Group (LDHWG). Adopting this proposal would eliminate certain regulatory differences between the airworthiness standards of the FAA and European Aviation Safety Agency (EASA) without affecting current industry design practices. This action would revise the pitch maneuver design loads criteria; revise the gust and turbulence design loads criteria; revise the application of gust loads to engine mounts, high lift devices, and other control surfaces; add a “round-the-clock” discrete gust criterion and a multi-axis discrete gust criterion for airplanes equipped with wing-mounted engines; revise the engine torque loads criteria; add an engine failure dynamic load condition; revise the ground gust design loads criteria; revise the criteria used to establish the rough air design speed, and require the establishment of a rough air Mach number.

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