For many, multilateration (sometimes abbreviated Mlat) is one of those vague ATC terms that is always hard to define. Put simply, it is how a spread-out group of small, unmanned, ground-based “listening posts” continuously monitors aircraft transponder signals, and then collectively triangulates them to derive individual aircraft positions. Following that, they send those positions plus their idents, altitudes and other data to ATC.
“There will be some truth-telling,” declared new NTSB chair Deborah Hersman on Tuesday as she began her opening address at the FAA International Runway Safety Summit held this week in Washington, D.C. As part of that telling, she noted that in July 2000 the NTSB issued six recommendations to the FAA to amend various ATC procedures that, in the NTSB’s judgment, unnecessarily added to the risks associated with airport surface operations.
The NTSB is investigating a runway incursion that occurred last Friday morning at Charlotte (N.C.) Douglas International Airport involving a PC-12 turboprop single and CRJ200 regional jet. At about 10:17 a.m. that day, the PSA Airlines CRJ200–operated as US Airways Express Flight 2390–was cleared for takeoff on Runway 18L.
Bombardier CRJ700/Cessna 172, Allentown, Pa., Sept. 19, 2008–The NTSB has issued an update on the CRJ/172 runway incursion at Lehigh International Airport (see AIN, November, page 98). The Cessna 172 was cleared to land on Runway 6, where the Mesa Air Shuttle regional jet was holding short for the landing traffic.
Cessna 172 and Dassault Falcon 200, Teterboro, N.J., July 9, 2008–The NTSB blamed the Teterboro Airport (TEB) runway incursion on the ground controller’s failure to instruct the pilot of the Cessna 172 that was taxiing in after landing to hold short of Runway 24, on which the Falcon had been cleared for takeoff by the tower controller.
Bombardier CRJ700, Allentown, Pa., Sept. 19, 2008–A Mesa Airlines CRJ was involved in a runway incursion with a Cessna 172 at Lehigh Valley International Airport (ABE) in night VMC. The 172 was landing on Runway 6 when the tower told the CRJ to position and hold on the same runway. As the CRJ was taking off, the 172 missed its taxiway exit and continued down the runway.
With a near runway collision in Allentown, Pa., fresh in their minds, the House aviation subcommittee members revisited the persistent problem of runway incursions late last month.
A near runway collision between a United Airlines regional jet and a Cessna 172 at Lehigh Valley International Airport (ABE) in Allentown, Pa., on September 19 underscored testimony by a top government official on Friday that “the risk of runway incursions is still high.” Gerald Dillingham, director of physical infrastructure issues for the Government Accountability Office, told the House aviation subcommittee that the primary cause of incursi
The FAA has reached agreements with four U.S. airlines to fund in-cockpit runway safety systems, in this case electronic flight bags (EFBs), in exchange for the operational data those systems would generate. Under the plan, the FAA will provide $600,000 each to SkyWest Airlines, Piedmont Airlines, US Airways and Southwest Airlines to invest in the new technology in airplanes they’ll fly into and out of 21 testbed airports.
The National Transportation Safety Board is investigating two recent runway incursions at Teterboro (N.J.) Airport (TEB). The probe will focus on a June 25 incident involving a Learjet 45 and a July 9 ground incursion involving a NetJets Dassault Falcon 2000 and a Cessna 172.