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Colgan Air 3407

Printed page vii. PDF page 11.

cockpit voice recorder CWA Center Weather Advisory DOD Department of Defense eice en route ice accumulation EWR Newark Liberty International Airport FAA Federal Aviation Administration FDR flight data recorder FOQA flight operational quality assurance FRMS fatigue risk manage
Open final report at PDF page 11NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407

Colgan Air 3407

Printed page 15. PDF page 29.

landing. The check airman also stated that crews could enter the keyword "eice" (en route ice accumulation), which would add 90 pounds to the airplane's calculated landing weight to compensate for the accumulated ice. The accident flight crew did not
Open final report at PDF page 29NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407

Colgan Air 3407

Printed page 21. PDF page 35.

includes electrical heating elements in the leading edge of each propeller blade to remove ice accumulations. A rotary switch on the ice protection panel is used to select propeller heat. Both front windshields and the pilot's side window have electronically
Open final report at PDF page 35NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407

Colgan Air 3407

Printed page 23. PDF page 37.

moderate rime ice while descending between 5,000 and 2,000 feet, with 2 to 3 inches of ice accumulation noted on the propeller spinners and some unprotected areas after arriving at BUF. The AirNow pilot also stated that the flight was
Open final report at PDF page 37NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407

Colgan Air 3407

Printed page 30. PDF page 44.

earth's gravity (32.174 feet/second2). 81 This weight did not consider the effects of ice accumulation because the flight crew had not made icing entries into the ACARS system when transmitting the landing performance data request, as previously explained in section
Open final report at PDF page 44NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407

Colgan Air 3407

Printed page 31. PDF page 45.

performance relative to the nominal airplane simulation model (with no airframe or engine ice accumulation) and an airplane model with a degraded performance level (which was consistent with that documented in the original certification for the Q400 while operating within
Open final report at PDF page 45NTSB AAR-10/01: Loss of control on approach, Colgan Air 3407