NTSB Identification: OPS14IA006
Incident occurred Friday, April 25, 2014 in Kona, HI
Aircraft: BOEING 757 2S7, registration:
Injuries: Unavailable

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

On Thursday, April 25, 2014, about 1316 Hawaiian standard time, a loss of air traffic control separation occurred on airway R578 about 43 nautical miles southwest of FAPIS waypoint, when a Boeing 757-300 (B753), en route from Kona International Airport, Kona, Hawaii to Los Angeles, California, passed in close proximity to a Boeing 757-200 (B752), en route to Kahului Airport, Kahului, Hawaii, from Phoenix, Arizona. At the time of the incident, both aircraft were on regularly scheduled 14 Code of Federal Regulations Part 121 passenger flights and operating in full compliance with air traffic control clearances issued by the Federal Aviation Administration's Honolulu Control Facility (HCF). There was no damage reported to either aircraft, or any injuries to passengers or crew.

Because of traffic conditions in oceanic airspace, Oakland Air Route Traffic Control Center Oceanic Control requested approval from HCF to allow the B752 to enter HCF airspace on R578 at flight level 330, an inappropriate altitude for the direction of flight. HCF approved the request. When the B752 reported 9 miles northeast of FAPIS waypoint on R578, the HCF radar controller issued a transponder code to the pilot. The B752 flew about 35 nautical miles southwest on R578 before the aircraft was detected by radar and appeared on the HCF controller's display. At that time, the B753 was northeast-bound at flight level 330, also on R578, opposite direction to the B752 and in radar contact with HCF. When the B753 was about 5.3 nautical miles from the B752, the pilot of the B753 reported that they had received a resolution advisory from their on-board anti-collision system and executed an emergency descent. The B752 reported that they had also responded to a resolution advisory and climbed.

According to FAA separation standards, the two aircraft should have been at different altitudes 10 minutes before they passed. When the radar system began detecting the B752, the two aircraft were about 14.1 nautical miles (about one minute) apart, flying towards each other on opposite courses at the same altitude.

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