1.   Eventually, Federal Aviation Administration officials, Oakland airport traffic controllers, and a helicopter pilot from the East Bay Regional Parks system tracked its wandering course.

2.   He added, however, that the agency is looking at training and other steps to reverse a recent increase in incursion-causing errors by airport tower controllers.

3.   It guides the traffic until local airport controllers take over to monitor landings and takeoffs.

4.   Airport controllers cleared the plane to land but asked Wu to approach the runway from the opposite direction because of headwinds.

5.   Airport controllers gave the plane permission to land but asked Wu to approach the runway from the opposite direction because of a strong headwind.

6.   Airport traffic controllers also had to command an in-bound Chinese Eastern jet to abort its landing, it said.

7.   He said the investigation will determine whether it was pilot error or whether airport flight controllers mistakenly cleared both planes to use the runway at the same time.

8.   Just before the pilot prepared to land at Palali, he asked the airport traffic controller if the runway lights were on, officials said.

9.   New Delhi airport controllers work with radar that does not show the altitudes of planes passing each other.

10.   The pilot had alerted Lagos airport traffic controllers minutes earlier to prepare for an emergency landing.