Errors by air traffic controllers in the vicinity of airports as well as incidents in which there was an unauthorized plane, vehicle, or person on a runway have increased sharply, a government watchdog said in a report released on Thursday.
Mistakes by controllers working at radar facilities that handle approaches and departures within about 50km of an airport that cause planes to fly too close together nearly doubled over three years ending in March, the US Government Accountability Office (GAO) report said.
Separately, runway incursions at airports with control towers increased from 11 incidents per million takeoffs and landings in the 2004 federal budget year to 18 incidents per million takeoffs and landings in last year’s federal budget year. Most large and medium-sized airports have control towers. Such “runway incursions,” as they are called, can involve anything that’s not supposed to be on a runway, from a stray baggage cart to a plane that makes a wrong turn while taxiing.
The deadliest accident in aviation history occurred on March 27, 1977, on an airport runway on the Spanish island of Tenerife in the Canary Islands when two Boeing 747s collided, killing 583 people.
The US Federal Aviation Administration (FAA) attributed the increases in controller errors to better error reporting.
FAA administrator Randy Babbitt has also previously said that the agency is using new a plane-tracking system at approach control facilities better able to spot planes too close together. However, the report said technologies aimed at improving automated reporting of incidents have not yet been fully implemented.
Apart from the automated system, the FAA has also adopted a new error reporting policy that encourages controllers to disclose their mistakes by not punishing them for those errors.
The GAO report acknowledged that changes in reporting policies and procedures at the FAA may be partly responsible for the increases.
“However, trends may also indicate an increase in the actual occurrence of incidents,” it said.
The GAO report says that while FAA officials have met their goals for reducing runway incursions overall, the rate of incidents at airports with towers has increased.
“The increase in runway safety incidents raises significant concerns,” US House Transportation and Infrastructure Committee Chairman John Mica said, adding that his committee would host a meeting with FAA officials and others on the issue.
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