In the northern hemisphere, it’s that time of year again, when clouds are full of ice and it’s time to dust off those icing training manuals and relearn the pertinent points about handling icing conditions.
MITSUBISHI MU-2, LEWISTON, IDAHO, FEB. 11, 2000–“The pilot failed to follow the flight manual procedures and did not engage the continuous ignition system, resulting in both engines flaming out when ice blocked the air induction system.
The FAA today released a new fact sheet, “Safer Flying in Icing Conditions,” to remind operators that aircraft icing is a “continuing concern in all parts of aviation, from small planes to jumbo jets.” To combat icing-related accidents, the FAA is employing a multi-pronged approach to icing issues, using immediate safety actions and longer-term rule changes.
Sikorsky’s S-92 has successfully completed the artificial icing requirement of the FAA’s icing-certification program, thus preparing the aircraft for its final all-weather-operations certification phase. It has already completed more than 80 percent of the requirements for icing certification and begun natural icing trials, with several successful natural icing events flown to date.
The FAA last month released a final rule governing certification of transport-category (Part 25) airplanes for operation in icing conditions. The new rule, which takes effect October 9, effectively added new material to Part 25, Appendix C, the section that details the so-called icing envelope.
The FAA yesterday released a final rule governing certification of transport-category (Part 25) airplanes for operation in icing conditions, effective October 9. In publishing the new rules, the FAA added new material to Part 25, Appendix C, the section that details the so-called icing envelope. The new Appendix C material, however, does not address the NTSB’s desire for the icing envelope to be expanded to include larger icing droplets.
Summer is almost upon us in the northern hemisphere, but the FAA is embroiled in two significant icing-related issues: a proposed new rule for when de-ice systems are activated and a new interpretation of the term “known icing.”
Comments are due today on an FAA draft letter of interpretation released April 3 on the meaning of the term “known icing conditions.” At press time, 82 comments had been filed, mainly by individuals.
The NTSB has published the final report on the Icing-related crash of a Cessna Citation 560 that stalled during approach to Runway 26R at Pueblo Memorial Airport on Feb. 16, 2005. The two pilots and six passengers were killed.
In an unusual policy step, the FAA sought comments last month on a draft letter of interpretation regarding the meaning of the term “known icing conditions,” used–but undefined–in the FARs.