Selawik

The pilot was departing a remote airport to begin a VFR cargo flight. The departure path took the airplane over ice covered terrain. The airport was considered to be below basic VFR conditions with light snow and fog, and the visual conditions in the area were considered to be 'flat' with the visibility from 2 to 3 miles. The pilot received a special VFR clearance out of the control zone by a flight service station specialist. After departure, witnesses observed the airplane climb to an estimated 500 feet above the ground and turn to the right. Shortly thereafter, the airplane banked to the right about 90 degrees, then descended to the ground in a wing and nose low attitude. A postaccident inspection of the airframe and engine did not reveal any mechanical malfunction.

The heavily loaded fuel tanker landed with an approximate 3 knot tailwind, overran the departure end of the runway, and came to a stop on a frozen river. The last two thirds of the 3,150 feet long gravel runway was covered with ice. The crew stated that the propellers either failed to go into reverse, or were slow in reversing, to assist in stopping. Examination revealed that all propeller blades were in the reversed position. Outside air temperature was minus 30 to minus 35° F. The airplane performance chart used to calculate the landing distance was for 'concrete runways'. Stopping distance was not predicated on the use of reverse propeller thrust. Post accident calculations, using the same chart, found the estimated landing distance needed for the accident flight to be 100 to 200 feet more than the length of the runway.

According to the FAA specialist on duty at the Nome flight service station the pilot of Munz Northern flight 601 requested only the Ambler weather at 0030 gmt. The only surviving passenger stated that the flight departed Nome, AK at 1330 bst and as the flight continued north she could only see straight down and was nervous because the ground was so close. She further stated that the props changed their sound which related to the sound they made earlier in the flight when the aircraft climbed to clear a mountain. She also added that they were in whiteout conditions prior to impact and there were no mechanical irregularities that she was aware of. The pilot and a passenger were killed.