Jets Had Adequate Separation
Delta pilot aborted a landing Tuesday at Logan International
Airport in Boston, after an onboard traffic collision avoidance
system alarm sounded. At 4:37 pm, the TCAS system onboard the
Boeing 757 detected the presence of a Delta Connection regional jet
operated by Chautauqua Airlines. Both planes were descending over
Hingham Bay toward the airport in gusty winds.
Radar data indicates the 757 was about 100 feet above a Delta
Connection regional jet -- but the jets had approximately 3,500
feet of horizontal separation, FAA spokesman Jim Peters said
"There was no potential for a collision," Peters said.
After performing the go-around, the Delta pilot radioed that the
other jet was "just about 100 feet below us," according to Boston's
Controllers warned both pilots to keep each other in sight
during their descents toward nearly parallel runways. Both pilots
acknowledged the order, Peters said.
It was unlikely the pilots mistook another jet in the area for
the one they were instructed to keep in sight, Peters said.
The Atlanta, GA-based airline is investigating the incident.
"Anything that's not a normal routine flight operation, we would
have a report from our pilots and launch an investigation and get
everyone's side of the story," spokeswoman Gina Loughlin said.
The landing patterns used Tuesday are a new configuration, since
the opening of a new runway at Logan in November 2006.
When crosswinds gust to 10 knots or greater, smaller aircraft
can use Runway 14/32. Larger aircraft make staggered landings on
the nearly parallel Runway 33L only when clear conditions prevail,
to enable pilots to properly monitor the position of other