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Medium large transport aircraft cleared for heading change right after takeoff. Flight crew understands to turn right to the heading, which is also logical since it is the shortest way. Departure controller intervened and gives another clearance which makes flight crew think, either controller gave a wrong direction turn or they misunderstood.
| Attributes | |
| ACN | 395160 |
| Time | |
| Date | 199802 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude climbout : initial |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 14000 flight time type : 1000 |
| ASRS Report | 395160 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
On takeoff from iah runway 32R I think we were told to turn right heading 120 degrees climb to 4000 ft. About halfway around (about 030 degrees), was told to turn right heading 180 degrees maintain 3000 ft. I think the tower might have said, or meant to say, left turn to 120 degrees. To prevent a turn the wrong way, if a turn is the long way to a heading the tower should make sure you know it is not the short way to your heading. The takeoff can be busy and it is easy to miss a heading turn you do not expect.
Original NASA ASRS Text
Title: MLG ACFT CLRED FOR HEADING CHANGE RIGHT AFTER TKOF. FLC UNDERSTANDS TO TURN R TO THE HEADING, WHICH IS ALSO LOGICAL SINCE IT IS THE SHORTEST WAY. DEP CTLR INTERVENED AND GIVES ANOTHER CLRNC WHICH MAKES FLC THINK, EITHER CTLR GAVE A WRONG DIRECTION TURN OR THEY MISUNDERSTOOD.
Narrative: ON TKOF FROM IAH RWY 32R I THINK WE WERE TOLD TO TURN R HDG 120 DEGS CLB TO 4000 FT. ABOUT HALFWAY AROUND (ABOUT 030 DEGS), WAS TOLD TO TURN R HDG 180 DEGS MAINTAIN 3000 FT. I THINK THE TWR MIGHT HAVE SAID, OR MEANT TO SAY, L TURN TO 120 DEGS. TO PREVENT A TURN THE WRONG WAY, IF A TURN IS THE LONG WAY TO A HDG THE TWR SHOULD MAKE SURE YOU KNOW IT IS NOT THE SHORT WAY TO YOUR HEADING. THE TKOF CAN BE BUSY AND IT IS EASY TO MISS A HEADING TURN YOU DO NOT EXPECT.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.