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CRJ900 captain reported a track deviation resulted when the autopilot was not engaged as the reporter thought it was. A mild wake turbulence encounter was cited as contributing.
| Attributes | |
| ACN | 1317605 |
| Time | |
| Date | 201512 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ATL.Airport |
| State Reference | GA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Climb |
| Route In Use | SID MUNSN EIGHT |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 170 Flight Crew Total 22500 Flight Crew Type 15000 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
At 1000 AGL on takeoff from atl on the munsn SID from runway 27R; I called for the autopilot to be selected on by my first officer. We encountered mild wake turbulence from the departing B757 in front of us simultaneously with my 'autopilot' call. The first officer selected the autopilot but apparently did not depress the button hard enough and the a/P failed to engage. I thought that it had so I took my hands off the controls. I had placed the aircraft in a slight left turn and it continued to turn slightly past the departure course. Once I noticed the minor deviation; I immediately corrected back to the departure course and reintercepted. I then called for the a/P and the first officer engaged it and verified it was on. No other deviation of outbound track occurred after that and we continued with the departure.
Original NASA ASRS Text
Title: CRJ900 Captain reported a track deviation resulted when the autopilot was not engaged as the reporter thought it was. A mild wake turbulence encounter was cited as contributing.
Narrative: At 1000 AGL on takeoff from ATL on the MUNSN SID from RWY 27R; I called for the autopilot to be selected on by my FO. We encountered mild wake turbulence from the departing B757 in front of us simultaneously with my 'autopilot' call. The FO selected the autopilot but apparently did not depress the button hard enough and the A/P failed to engage. I thought that it had so I took my hands off the controls. I had placed the aircraft in a slight left turn and it continued to turn slightly past the departure course. Once I noticed the minor deviation; I immediately corrected back to the departure course and reintercepted. I then called for the A/P and the FO engaged it and verified it was on. No other deviation of outbound track occurred after that and we continued with the departure.
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.