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B737 captain reported that unfamiliarity with a new aircraft caused them to inadvertently disconnect the autothrottle during a go-around.
| Attributes | |
| ACN | 1719849 |
| Time | |
| Date | 202001 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Tower |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autothrottle/Speed Control |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
ZZZ tower told us to go-around due to the aircraft landing in front of us not clearing the runway. On go-around I inadvertently pressed the autothrottle disconnect switch instead of the go-around switch. As I rotated and began the go-around litany; my first officer stated 'airspeed.' I had not added enough power during clean-up and our airspeed got below vref.I am new to the 737; just reaching the 100-hour consolidation period last week. It has taken me over 3 1/2 months to accumulate the 100 hours. I am very junior on the aircraft so I am on reserve and have not flown very often. I transitioned from the MD80 which I have flown for over 11 years straight. On the go-around; I was having trouble locating the go-around switch on the throttles because my old habit pattern kicked in and I was searching for the switch where it used to be on the MD80. I then mistakenly pressed the auto throttle disconnect switch and initially did not added enough power for the go-around.I have to mentally practice the go-around procedure; including all of the physical movements I would be making during the go-around so that my hand can reflexively find the go-around switch instead of reverting to old 'muscle memory'.
Original NASA ASRS Text
Title: B737 Captain reported that unfamiliarity with a new aircraft caused them to inadvertently disconnect the autothrottle during a go-around.
Narrative: ZZZ Tower told us to go-around due to the aircraft landing in front of us not clearing the runway. On go-around I inadvertently pressed the autothrottle disconnect switch instead of the go-around switch. As I rotated and began the go-around litany; my First Officer stated 'Airspeed.' I had not added enough power during clean-up and our airspeed got below Vref.I am new to the 737; just reaching the 100-hour consolidation period last week. It has taken me over 3 1/2 months to accumulate the 100 hours. I am very junior on the aircraft so I am on reserve and have not flown very often. I transitioned from the MD80 which I have flown for over 11 years straight. On the go-around; I was having trouble locating the go-around switch on the throttles because my old habit pattern kicked in and I was searching for the switch where it used to be on the MD80. I then mistakenly pressed the auto throttle disconnect switch and initially did not added enough power for the go-around.I have to mentally practice the go-around procedure; including all of the physical movements I would be making during the go-around so that my hand can reflexively find the go-around switch instead of reverting to old 'muscle memory'.
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.