It’s probable that a bent-down microphone jack receptacle–a non-OEM installation–found near the base of the copilot’s control column prevented aft movement of the yoke, causing a Challenger 600 to overrun the runway during takeoff from Tupelo Regional Airport, Miss., on March 9, according to a Bombardier Advisory Wire sent to operators of 600-series Challengers.
The FAA is concerned that some noise-canceling headsets might prevent pilots from hearing audible alarms, abnormal engine noise or other mechanical sounds. The agency, in a January 1 Information for Operators (InFO 07001), said noise attenuation of headsets “may vary by make and model” and if these sounds cannot be detected “discontinue the use of noise-canceling headsets.”
All jet and transport-category airplanes (those with an mtow of 12,500 pounds or more) for which application of a new type design is submitted on or after January 1 this year have to meet new noise certification levels. Stage 4 is a cumulative 10 EPNdB (effective perceived noise level in decibels) less than Stage 3 limits. Virtually all in-production business jets will qualify to be recertified under Stage 4.
According to Aerion market research, there is sufficient demand to proceed with development of the company’s proposed supersonic business jet (SSBJ). The Reno, Nevada-based firm publicly unveiled its SSBJ program last October at the National Business Aviation Association Convention in Las Vegas, saying the natural-laminar-wing aircraft could be in service by 2011.
A new and innovative ultralight headset that can be seen on the Terma stand (C232) is gaining support among airline and corporate aircraft pilots, following its certification in the wake of trials last year.
Research carried out in the field of supersonic transport within the European Commission’s 6th Research Framework Program (FP6) has come into the spotlight recently since Italy’s Alenia and Russian design bureau Sukhoi concluded a cooperation agreement.
Gulfstream Aerospace president Bryan Moss has dismissed the company’s long-discussed “Quiet Supersonic Jet” (QSJ). At a press conference at EBACE earlier this month, he asked, “Will Gulfstream build a supersonic business jet? Read my lips: No!” He said the company is devoting its research efforts in this field to two issues: rule changes that would allow supersonic flight over land and sonic-boom suppression.
After a whole lot of fanfare two years ago, when the Aerion and Supersonic Aerospace International (SAI) quiet supersonic business jet (SSBJ) concepts were first announced at the 2004 NBAA Convention, work continues on the development of these and other supersonic business jet designs, albeit more quietly.
Telex Communications, a long-time provider of commercial aviation headsets, has a new product that offers battery-free active noise reduction (ANR). The Airman 850, being demonstrated at Booth No. 2106, is the only headset on the commercial market to use voltage from microphone bias to power its active noise reduction technology and requires no special aircraft panel power.
Gulfstream reported that its Quiet Spike sonic-boom mitigator successfully achieved supersonic flight on October 20. The OEM has been flight-testing the structural integrity of its Quiet Spike since mid-July. Mounted on the nose of a NASA F-15B and flown at Mach 1.2, the Quiet Spike operated as designed. It extended to its maximum length of 24 feet and performed as expected during the 1.5-hour test flight.