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Embraer 175 first officer reported the autopilot did not follow the flight director and deviated right of course.
| Attributes | |
| ACN | 1525042 |
| Time | |
| Date | 201803 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 170/175 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types |
Narrative:
Took off on the RNAV departure. Autopilot was armed and in LNAV. Captain and I noticed the autopilot wasn't following the flight director correctly and we had started to deviate right of course. He disengaged the autopilot and corrected course to the left.ATC asked to verify we were headed to [a fix] on the departure. I confirmed and told him it seems the autopilot did not guide us there correctly and we had turned left back to the correct course. ATC gave us a heading back to the right heading of 300 degrees and we complied. I asked ATC if he would like us direct zzzzz intersection and he cleared us direct [to the intersection]. I redirected the FMS to [the intersection] and armed ap and LNAV with no other issues.automation is a great tool but sometimes they have glitches just like any other computer. It is important to remain diligent especially in critical phases of flight.
Original NASA ASRS Text
Title: Embraer 175 First Officer reported the autopilot did not follow the flight director and deviated right of course.
Narrative: Took off on the RNAV DEPARTURE. Autopilot was armed and in LNAV. Captain and I noticed the autopilot wasn't following the flight director correctly and we had started to deviate right of course. He disengaged the autopilot and corrected course to the left.ATC asked to verify we were headed to [a fix] on the Departure. I confirmed and told him it seems the autopilot did not guide us there correctly and we had turned left back to the correct course. ATC gave us a heading back to the RIGHT heading of 300 degrees and we complied. I asked ATC if he would like us direct ZZZZZ Intersection and he cleared us direct [to the intersection]. I redirected the FMS to [the intersection] and armed AP and LNAV with no other issues.Automation is a great tool but sometimes they have glitches just like any other computer. It is important to remain diligent especially in critical phases of flight.
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.