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Flight crew of a B727 failed to follow the assigned direct course due to the autoplt heading mode not being in the detent.
| Attributes | |
| ACN | 449590 |
| Time | |
| Date | 199909 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| State Reference | UT |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | controller : approach |
| Qualification | pilot : private pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 3000 flight time type : 600 |
| ASRS Report | 449590 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Resolutory Action | controller : issued alert flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Clearance was direct to myton VOR. ATC called us and queried our route direct to myton. We referenced HSI which showed heading was 45 degrees off from myton. As best we could tell, the reason for the heading error was caused by leaving the autoplt turn knob slightly out of the neutral detent. The 1/2 degree bank was not noticeable and the heading error slowly occurred.
Original NASA ASRS Text
Title: FLC OF A B727 FAILED TO FOLLOW THE ASSIGNED DIRECT COURSE DUE TO THE AUTOPLT HDG MODE NOT BEING IN THE DETENT.
Narrative: CLRNC WAS DIRECT TO MYTON VOR. ATC CALLED US AND QUERIED OUR RTE DIRECT TO MYTON. WE REFED HSI WHICH SHOWED HDG WAS 45 DEGS OFF FROM MYTON. AS BEST WE COULD TELL, THE REASON FOR THE HDG ERROR WAS CAUSED BY LEAVING THE AUTOPLT TURN KNOB SLIGHTLY OUT OF THE NEUTRAL DETENT. THE 1/2 DEG BANK WAS NOT NOTICEABLE AND THE HDG ERROR SLOWLY OCCURRED.
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.