Manufacturers of very light jets (VLJs) will be affected by new Advisory Circular 23.1419-2D, which provides guidance in meeting Part 23 requirements for obtaining approval to fly into icing conditions. Comments on a draft of the circular are due by March 6. The advisory will supersede all previous policies related to ice-protection systems on Part 23 airplanes, as well as an advisory circular on contaminated-tailplane stalls.
Comments are due March 5 on an FAA proposal to require a low-airspeed awareness system on Cessna 208 and 208B Caravans. The installation will cancel the prohibition against operating the turboprop single in moderate or worse icing conditions.
During the January 23 public meeting on the icing-related crash of a Cessna Citation 560 near Pueblo, Colo., NTSB members criticized the FAA and Cessna for not updating critical icing information used by pilots and certification engineers.
In the spirit of the season, the NATA Safety First program has made available its aircraft de/anti-icing training module, designed specifically for line techs, ground handlers, flight crews and dispatch personnel. The interactive, online training provides the latest and safest de/anti-icing procedures available. NATA urges personnel to review critical issues such as training, procedures and responsibilities annually.
The Australian Transport Safety Bureau (ATSB) listed it as merely a serious incident but considered it significant enough to issue a full report. The incident involved the loss of control a Saab 340 experienced when it encountered icing. There were no injuries and no damage to the aircraft, but the pilots did not recover from the loss of control until the aircraft was only 112 feet above the ground.
The NTSB’s debunking of the ice-bridging hypothesis in the conclusions of its investigation of the Feb. 16, 2005, fatal crash of a Circuit City Citation 560 and determining that the pilots did not activate the de-icing boots on the approach will take some pilots back seven years. In February 2000 the long-time policy of waiting for ice to build before activating boots got the boot.
Operators of all U.S.-registered Challenger 600s, 601s and 604s and Canadair Regional Jets, which are derived from the business jet, must incorporate flight manual revisions to ensure that before takeoff the “wing leading edge and upper wing surface are completely free of ice, frost, snow or slush,” under a new AD. The FAA directive (AD 2005-04-07) followed an identical AD from Transport Canada.
Much has been written lately about the potential cost of not de-icing a business airplane before attempting to fly it, so we posed the question recently in our AINalerts twice-weekly electronic news bulletin, “What about the cost of de-icing? The price seems to vary wildly. What is the most you have paid to have a business jet de-iced? What type of airplane was it, which facility de-iced it, and what were the circumstances?”
According to the NTSB, the Flight Options Beechjet 400A (N455CW) that experienced a dual flameout over the Gulf of Mexico on July 12 last year had a lower-than-normal amount of anti-icing additives in its tanks. Both Pratt & Whitney Canada JT15D turbofans failed as the twinjet was descending through 39,000 feet about 100 miles off Florida’s west coast.
Researchers from the U.S., Canada, Britain and France are participating in a major aircraft icing study taking place this winter primarily in the Montreal area. Canada’s National Research Council is leading the Alliance Icing Research Study with its Convair CV-580 in partnership with NASA’s DHC-6 Twin Otter.