The FAA issued a special airworthiness information bulletin (SAIB) NM-14-05 related to potential wing/aileron oscillations on various BAe 125/Hawker business jets. The November 27 bulletin covers the following types: the 750, 800, 800A (including C-29A and U-125/U-125A versions), 800B, 800XP, 850XP, 900XP, 1000, 1000A and 1000B.
Last May, Aviation Partners issued Service Bulletin SBH-13-001 limiting winglet-equipped 800-series Hawkers to a maximum permissible altitude of 34,000 feet. The result of reported vibrations and aileron/wing oscillations, the SB prompted the FAA to issue an Airworthiness Directive calling for operators to comply with the service bulletin within 45 days.
For many years, a small company named Lam Aviation has showcased its variable-geometry wing design at EAA AirVenture. Company founder Lawrence Lam (who passed away in 2010) even designed and built his own low-wing, retractable gear, single-engine airplane–the Wanderer–to demonstrate the concept and flew that airplane to Oshkosh three times.
The FAA has approved a process to remove an altitude restriction on 800-series Hawkers equipped with winglets developed by Aviation Partners (API). The agency issued an airworthiness directive in June, requiring operators to comply with API service bulletin SBH-13-001, which limited maximum altitude to 34,000 feet until a fix could be developed. AD 2013-11-16 was “prompted by reports of several instances of severe vibration and wing/aileron oscillations,” according to the FAA.
As expected, the FAA has published an Airworthiness Directive for 800-series Hawkers equipped with Aviation Partners (API) winglets.
In a Service Bulletin issued May 3, winglet manufacturer Aviation Partners (API) instructed operators with winglet-equipped 800-series Hawkers modified by STC#ST01411SE to reduce maximum permissible altitude to 34,000 feet. “Several instances of aileron/wing oscillations have been reported on the Hawker 800 [series],” the company said. “Aviation Partners and the FAA consider this Service Bulletin to be a safety-related limitation until a design change to preclude the oscillations is developed and FAA approved.”
Loss of control in flight related to the inability to recognize an upset and controlled flight into terrain remain the primary causes of accidents involving transport aircraft.
The FAA has issued a notice of proposed rulemaking for an Airworthiness Directive for certain Embraer Phenom 300s. It is based on an unsafe condition as a result of an inadequate number of drain holes in the primary control surfaces (rudder, elevators and ailerons), which may allow water to accumulate in the control surfaces.
The FAA has issued an Airworthiness Directive for the Gulfstream Aerospace Galaxy and Gulfstream 200, citing cracked nuts found on the aircraft’s production line during routine post-assembly inspection. Investigation revealed that the cracks resulted from hydrogen embrittlement combined with high hardness.
There’s no better way to start off an EAA AirVenture show in Oshkosh, Wis., with a little flying out of the world’s busiest airport (during the week-long show, at least). Last year, the Gobosh folks were kind enough to invite me to fly the Gobosh 700A Light Sport Aircraft (LSA). This year, Remos Aircraft is demonstrating its newest LSA, the GX NXT, a high-wing composite two-seater powered by a 100-hp Rotax 912ULS.
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