Colonia

The pilot was conducting a GPS circling instrument approach in instrument meteorological conditions to an airport with which he was familiar. During the final minute of the flight, the airplane descended to and leveled off near the minimum descent altitude (MDA) of about 600 ft mean sea level (msl). During this time, the airplane’s groundspeed slowed from about 90 knots to a low of 65 knots. In the few seconds after reaching 65 knots groundspeed, the flight track abruptly turned left off course and the airplane rapidly descended. The final radar point was recorded at 200 ft msl less than 1/10 mile from the accident site. Two home surveillance cameras captured the final few seconds of the flight. The first showed the airplane in a shallow left bank that rapidly increased until the airplane descended in a steep left bank out of camera view below a line of trees. The second video captured the final 4 seconds of the flight; the airplane entered the camera view already in a steep left bank near treetop level, and continued to roll to the left, descending out of view. Both videos showed the airplane flying below an overcast cloud ceiling, and engine noise was audible until the sound of impact. Postaccident examination of the airplane revealed no evidence of preimpact mechanical malfunctions that would have precluded normal operation. The propeller signatures, witness impact marks, audio recordings, and witness statements were all consistent with the engines producing power at the time of impact. The pilot likely encountered restricted visibility of about 2 statute miles with mist and ceilings about 700 ft msl. When the airplane deviated from the final approach course and descended below the MDA, the destination airport remained 3.5 statute miles to the northeast. Although the airplane was observed to be flying below the overcast cloud layer, given the restricted visibility, it is likely that the pilot was unable to visually identify the airport or runway environment at any point during the approach. According to airplane flight manual supplements, the stall speed likely varied from 76 to 67 knots indicated airspeed. The exact weight and balance and configuration of the airplane could not be determined. Based upon surveillance video, witness accounts, and automatic dependent surveillance-broadcast data, it is likely that, as the pilot leveled off the airplane near the MDA, the airspeed decayed below the aerodynamic stall speed, and the airplane entered an aerodynamic stall and spin from which the pilot was unable to recover. Based on a readout of the pilot’s cardiac monitoring device and autopsy findings, while the pilot had a remote history of arrhythmia, sudden incapacitation was not a factor in this accident. Autopsy findings suggested that the pilot’s traumatic injuries were not immediately fatal; soot material in both the upper and lower airways provided evidence that the pilot inhaled smoke. This autopsy evidence supports that the pilot’s elevated carboxyhemoglobin level was from smoke inhalation during the postcrash fire. In addition, there were no distress calls received from the pilot and there was no evidence found that would indicate there was an in-flight fire. Thus, carbon monoxide exposure, as determined by the carboxyhemoglobin level, was not a contributing factor to the accident.

Air Micronesia Flight 614 departed Saipan at 07:30 for a flight to Palau with intermediate stops in Guam and Yap, Western Caroline Islands. The aircraft departed Guam at 08:30 and climbed to FL350. An en route descent to Yap was made from the north through broken to scattered clouds and the captain, who was flying the aircraft, turned onto a downwind leg at the northeast portion of the airport. The downwind leg was flown at an altitude of 600 feet above the runway 07 elevation while the crew checked to see if the runway was clear, to see if the fire truck was in place, and to see the direction of the windsock. The flaps were set at 30° on the base leg. Abeam the approach end of runway 07, the captain began a right 90° and a left turn manoeuvre to align the aircraft with the final approach to runway 07. During a portion of the downwind leg, the captain relinquished control of the aircraft to the first officer while the captain took pictures of the airport. He then resumed control and passed the camera to the second officer and asked him to take pictures of the runway. As the aircraft passed through 90deg from the runway heading, it had descended to about 300 feet above the runway elevation of 52 feet msl. When the aircraft was aligned with the runway heading, it was about 480 feet above runway elevation at a point 1.5 miles from the approach end of the runway. At 09:52 the aircraft touched down 13 feet short of runway 07. The right main landing gear immediately separated from the aircraft. The aircraft gradually veered off the runway and came to rest in the jungle about 1,700 feet beyond the initial touchdown. A severe ground fire erupted immediately along the right side of the aircraft as it came to rest. All occupants had evacuated within about 1 minute after the aircraft came to rest.