Table 1-4-12 - Monthly Summary of Tarmac Times Over 3 Hours: October 2008-April 2010
Table 1-4-12 - Monthly Summary of Tarmac Times Over 3 Hours: October 2008-April 2010
Number and Percent of Flights with Tarmac Times of 3 Hours or More
| Number of regularly scheduled flights | Tarmac times of 3 hours or longer | Stage of operation of the 3-hour tarmac time | ||||||
|---|---|---|---|---|---|---|---|---|
| Total | Percent | Prior to cancellation | Multiple gate departure | Taxi-out | Taxi-in | At diversion airport | ||
| Oct 2008 | 556,205 | 49 | 0.01 | 2 | 6 | 35 | 0 | 6 |
| Nov 2008 | 523,272 | 7 | 0.00 | 0 | 1 | 4 | 0 | 2 |
| Dec 2008 | 544,956 | 187 | 0.03 | 40 | 14 | 116 | 7 | 10 |
| Jan 2009 | 532,339 | 87 | 0.02 | 7 | 10 | 70 | 0 | 0 |
| Feb 2009 | 488,410 | 43 | 0.01 | 5 | 4 | 34 | 0 | 0 |
| Mar 2009 | 557,422 | 88 | 0.02 | 6 | 9 | 66 | 0 | 7 |
| Apr 2009 | 537,793 | 81 | 0.02 | 12 | 10 | 47 | 0 | 12 |
| May 2009 | 546,832 | 35 | 0.01 | 7 | 2 | 25 | 1 | 0 |
| June 2009 | 557,594 | 278 | 0.05 | 40 | 42 | 172 | 1 | 23 |
| July 2009 | 580,134 | 164 | 0.03 | 21 | 20 | 105 | 0 | 18 |
| Aug 2009 | 568,301 | 70 | 0.01 | 7 | 11 | 45 | 0 | 7 |
| Sep 2009 | 510,852 | 6 | 0.00 | 0 | 0 | 4 | 0 | 2 |
| Oct 2009 | 531,799 | 12 | 0.00 | 0 | 0 | 12 | 0 | 0 |
| Nov 2009 | 509,540 | 4 | 0.00 | 0 | 1 | 2 | 0 | 1 |
| Dec 2009 | 529,269 | 35 | 0.01 | 5 | 3 | 22 | 0 | 5 |
| Jan 2010 | 521,809 | 21 | 0.00 | 2 | 3 | 11 | 2 | 3 |
| Feb 2010 | 481,988 | 61 | 0.00 | 5 | 1 | 53 | 1 | 1 |
| Mar 2010 | 548,282 | 25 | 0.00 | 9 | 2 | 11 | 1 | 2 |
| Apr 2010 | 529,330 | 4 | 0.00 | 0 | 0 | 1 | 0 | 3 |
NOTE: January 2009 includes one flight with two separate 3-hour tarmac times. Northwest Flight 1491 on Jan. 28, 2009 was on the tarmac for 188 minutes before returning to the gate. The flight departed the gate a second time and was on the tarmac for 199 minutes before wheels-off. Details of the flight are listed as a 3-hour multiple gate departure and a 3-hour Taxi-out. Table 12 of the Air Travel Consumer Report lists number of flights with three-hour tarmac times and counts NW Flight 1491 as a single flight.
Explanation of Stage of Operation
Prior to cancellation: Flight left the gate but was cancelled at the origin airport.
Multiple gate departure: Flight left the gate, then returned and then left again to resume normal operation. Tarmac time is the time before the return to the gate.
Taxi-out: The time between gate departure and wheels-off.
Taxi-in: The time between wheels-on and gate arrival.
At diversion airport: The tarmac time at the alternate airport.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, Tarmac Times, available at http://www.bts.gov/ as of July 2010.