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Air carrier captain reported a track heading deviation while on departure.
| Attributes | |
| ACN | 1764309 |
| Time | |
| Date | 202009 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 167 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
When taking off from ZZZ; runway xxl; we were cleared to climb via the ZZZZZ2 departure. Per the departure; at 1;146 feet we are to turn direct to ZZZZZ1. The departure was properly loaded and we took off in navigation mode; as is required. However; when reaching the time to turn to ZZZZZ1; we realized that the aircraft was not making the turn at the proper time and was instead continuing on runway heading. We were not immediately aware of the cause; so we asked departure for a heading; which they gave us; as well as a 'direct ZZZZZ3 when able to resume the departure.' once on the heading; we realized that the FMS's auto sequence was inhibited; which is why it didn't continue on the RNAV departure. We switched the FMS back into auto; rejoined the departure; and continued the flight without any further issues.while not entirely aware of why the FMS was inhibited; we think that it might have been accidentally selected while wiping/cleaning the FMS.
Original NASA ASRS Text
Title: Air Carrier Captain reported a track heading deviation while on departure.
Narrative: When taking off from ZZZ; Runway XXL; we were cleared to climb via the ZZZZZ2 departure. Per the departure; at 1;146 feet we are to turn direct to ZZZZZ1. The departure was properly loaded and we took off in NAV mode; as is required. However; when reaching the time to turn to ZZZZZ1; we realized that the aircraft was not making the turn at the proper time and was instead continuing on runway heading. We were not immediately aware of the cause; so we asked Departure for a heading; which they gave us; as well as a 'direct ZZZZZ3 when able to resume the departure.' Once on the heading; we realized that the FMS's auto sequence was inhibited; which is why it didn't continue on the RNAV departure. We switched the FMS back into auto; rejoined the departure; and continued the flight without any further issues.While not entirely aware of why the FMS was inhibited; we think that it might have been accidentally selected while wiping/cleaning the FMS.
Data retrieved from NASA's ASRS site 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.