The NTSB has followed up on its concerns over the 2004 crash of a Bombardier CL-600-2A12 with a series of recommendations owed to the "...particular concern to the Safety Board is that a qualified 14 CFR Part 135 captain and first officer, both of whom received winter weather operations training in accordance with the company's Federal Aviation Administration (FAA)-approved winter operations procedures, could fail to understand the insidious nature of upper wing surface contamination and its threat to the safety of the flight. Further, proper CRM could have helped the crew identify the risks associated with winter weather operations."

Safety Recommendation A-06-42

The National Transportation Safety Board recommends that the Federal Aviation Administration:

Develop visual and tactile training aids to accurately depict small amounts of upper wing surface contamination and require all commercial airplane operators to incorporate these training aids into their initial and recurrent training. (A-06-42)

In addition, the National Transportation Safety Board reiterates the following recommendation to the Federal Aviation Administration:

Require that 14 Code of Federal Regulations (CFR) Part 135 on-demand charter operators that conduct dual-pilot operations establish and implement a Federal Aviation Administration-approved crew resource management training program for their flight crews in accordance with 14 CFR Part 121, subparts N and O. (A-03-52)

FMI: www.ntsb.gov/recs/letters/2006/A06_42.pdf