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Just my opinion:
The Check Airman in the Blackhawk caused the collision (not an "accident") by several actions.
1) Reporting that he had traffic in sight, when he obviously didn't. I think he just said it to get ATC to let him continue the flight past the airport. He responded so quickly each time that he would not have time to look before he replied. Perhaps he saw the line of aircraft headed for Runway 1, and assumed that the CRJ was in that line, but that was negligent. He did this twice, and at least on the second instance the CRJ was pointing almost straight at him, not in the line with the other traffic, far enough above him that background lighting should not have been a factor, and had its landing lights on!
2) He was responsible, as check airman, to ensure that the pilot being checked was operating within the parameters of the approved flight path. He failed to do this. NTSB hasn't reported other dialogue from the CVR, and either he wasn't pointing out to her the deviations, or NTSB is trying to delay revealing it. Even if he was telling her to correct her errors, she didn't do it, and that lead to the collision. If she wasn't doing it, it was his responsibility to take over the controls to ensure safety of flight.
3) There seems to have been a difference between altitudes he reported to ATC and what was indicated on board the helicopter. Operating less than 500 feet above the ground/water and night, with major variations in altitude indications is reckless, even in visual conditions. This is even worse when night vision goggles are being used, which was the case here. The reported variation was half the maximum altitude (200 feet) allowed near the airport! In practice, they were operating without reliable altimeters, and the radar altimeter was not suitable for establishing a safe (and legal) altitude.
4) The check airman had been advised that the CRJ was doing a visual approach to Runway 33. This would cross the path of his flight, clearly about the same time he would be passing the final approach course. He chose to continue at the same speed, instead of slowing down to let the traffic cross ahead of him.
5) The check airman allowed the pilot to deviate to the right (west) of course, which should have taken the helicopter along the east bank of the river. The glideslope for Runway 33 would direct the CRJ to be over 400 feet high there, instead of a little over 300 feet near the point of impact. This is the difference between life and death.
6) The ATC transmission did not have a pause that would indicate it was complete before the direction to pass behind the CRJ. The check airman was so intent on brushing off ATC that he "stepped on" the last part of the controller's directions by pressing the mike button before the controller finished speaking. This is abnormal radio procedure. One always waits until the transmission has ended, usually for a couple of seconds, because sometimes ATC adds another comment. Everyone else on the frequency is expected to wait for the response to ATC before they transmit. The check airman obviously didn't want to hear from ATC, much less take action to address the controller's concerns. Remember, traffic alerts were going off at this time.
7) The pilot being checked was not highly experienced, and I believe was coming back from a non-flying assignment. She was getting back "up to speed" and flying a difficult course, at night, wearing NVG, in heavy traffic, in a helicopter with older instruments. Under the circumstances, it is not reasonable to expect perfection, and in fact the check airman is tasked to keep the pilot within safe parameters, and if necessary, take control of the aircraft. He failed to do that. I do not assign blame to the pilot being checked, as her responsibility was to do the best she could under the circumstances. So far, there is no evidence that she did anything less.
The Check Airman in the Blackhawk caused the collision (not an "accident") by several actions.
1) Reporting that he had traffic in sight, when he obviously didn't. I think he just said it to get ATC to let him continue the flight past the airport. He responded so quickly each time that he would not have time to look before he replied. Perhaps he saw the line of aircraft headed for Runway 1, and assumed that the CRJ was in that line, but that was negligent. He did this twice, and at least on the second instance the CRJ was pointing almost straight at him, not in the line with the other traffic, far enough above him that background lighting should not have been a factor, and had its landing lights on!
2) He was responsible, as check airman, to ensure that the pilot being checked was operating within the parameters of the approved flight path. He failed to do this. NTSB hasn't reported other dialogue from the CVR, and either he wasn't pointing out to her the deviations, or NTSB is trying to delay revealing it. Even if he was telling her to correct her errors, she didn't do it, and that lead to the collision. If she wasn't doing it, it was his responsibility to take over the controls to ensure safety of flight.
3) There seems to have been a difference between altitudes he reported to ATC and what was indicated on board the helicopter. Operating less than 500 feet above the ground/water and night, with major variations in altitude indications is reckless, even in visual conditions. This is even worse when night vision goggles are being used, which was the case here. The reported variation was half the maximum altitude (200 feet) allowed near the airport! In practice, they were operating without reliable altimeters, and the radar altimeter was not suitable for establishing a safe (and legal) altitude.
4) The check airman had been advised that the CRJ was doing a visual approach to Runway 33. This would cross the path of his flight, clearly about the same time he would be passing the final approach course. He chose to continue at the same speed, instead of slowing down to let the traffic cross ahead of him.
5) The check airman allowed the pilot to deviate to the right (west) of course, which should have taken the helicopter along the east bank of the river. The glideslope for Runway 33 would direct the CRJ to be over 400 feet high there, instead of a little over 300 feet near the point of impact. This is the difference between life and death.
6) The ATC transmission did not have a pause that would indicate it was complete before the direction to pass behind the CRJ. The check airman was so intent on brushing off ATC that he "stepped on" the last part of the controller's directions by pressing the mike button before the controller finished speaking. This is abnormal radio procedure. One always waits until the transmission has ended, usually for a couple of seconds, because sometimes ATC adds another comment. Everyone else on the frequency is expected to wait for the response to ATC before they transmit. The check airman obviously didn't want to hear from ATC, much less take action to address the controller's concerns. Remember, traffic alerts were going off at this time.
7) The pilot being checked was not highly experienced, and I believe was coming back from a non-flying assignment. She was getting back "up to speed" and flying a difficult course, at night, wearing NVG, in heavy traffic, in a helicopter with older instruments. Under the circumstances, it is not reasonable to expect perfection, and in fact the check airman is tasked to keep the pilot within safe parameters, and if necessary, take control of the aircraft. He failed to do that. I do not assign blame to the pilot being checked, as her responsibility was to do the best she could under the circumstances. So far, there is no evidence that she did anything less.