Air carrier first officer reported an incorrect go-around profile due to failure to arm the approach...

Attributes
ACN	1586797
Time
Date	201810
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Altitude Hold/Capture
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 177 Flight Crew Total 2290 Flight Crew Type 388
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Unstabilized Approach

Narrative:

We were on a RNAV approach at ZZZZ. We were given vectors and an altitude for the approach. Just before the FAF I checked and the vapp was armed; but I forgot to deselect the 'altitude sel' mode. We made the airplane level off at the selected altitude (probably 5000 ft). With this our vertical guidance turned off; so when I noticed it I called for the go around. During the go around I forgot to push the to/GA button. I've made the required calls for the go around; but the airplane didn't initiate a climb (because the to/GA haven't been pushed). Because of that the airplane accelerated fast; so the captain called me to check on the airspeed that was going fast toward the max structural airspeed; that was the time we noticed that the flaps were still at the 10 position. By that time we had oversped the flaps by 47 knots. After that we got vectors to another approach that happened without problems. It was a 3 day pairing that started with pm flights on the first two days and on the last day we had a [early morning] shuttle time. I went to bed; but couldn't fall asleep until passed midnight. I woke up after a bad night of sleep. I had woke up 4 times that night. So I believe fatigue was definitely a factor.

Original NASA ASRS Text

Title: Air carrier First Officer reported an incorrect go-around profile due to failure to arm the approach.

Narrative: We were on a RNAV Approach at ZZZZ. We were given vectors and an altitude for the approach. Just before the FAF I checked and the VAPP was armed; but I forgot to deselect the 'ALT SEL' mode. We made the airplane level off at the selected altitude (probably 5000 ft). With this our vertical guidance turned off; so when I noticed it I called for the go around. During the go around I forgot to push the TO/GA button. I've made the required calls for the go around; but the airplane didn't initiate a climb (because the TO/GA haven't been pushed). Because of that the airplane accelerated fast; so the Captain called me to check on the airspeed that was going fast toward the max structural airspeed; that was the time we noticed that the flaps were still at the 10 position. By that time we had oversped the flaps by 47 knots. After that we got vectors to another approach that happened without problems. It was a 3 day pairing that started with PM flights on the first two days and on the last day we had a [early morning] shuttle time. I went to bed; but couldn't fall asleep until passed midnight. I woke up after a bad night of sleep. I had woke up 4 times that night. So I believe fatigue was definitely a factor.

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.