A B757-200 flight crew reported executing a go-around after an unstabilized practice RNAV approach.

Attributes
ACN	1247208
Time
Date	201503
Local Time Of Day	1201-1800
Place
Locale Reference	MCO.Airport
State Reference	FL
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Inflight Event / Encounter Unstabilized Approach

Narrative:

I briefed a practice RNAV 36L visual approach at mco. When cleared for the visual approaching amebe at 3000 feet; flaps 5; 180 knots; I selected LNAV with auto pilot on. I then selected 500 feet in the altitude window and VNAV. The aircraft captured LNAV and started to climb. After trying to figure out why it was climbing I disconnected the ap at 3250 feet to hand fly the approach. While getting the gear down and flaps extended tower asked if we could take a visual to 36R at approx. 1800 feet. I accepted and moved over. While the first officer was looking up the ILS for 36R we missed the call/extension to 25 flaps. At the 1000 feet check we saw the flaps at 20 and executed a non eventful go around; approach and landing.when doing a visual and accepting a visual to a parallel runway both pilots should stay heads up until the landing check list is complete; then if time permits look up and tune the ILS.

Original NASA ASRS Text

Title: A B757-200 flight crew reported executing a go-around after an unstabilized practice RNAV approach.

Narrative: I briefed a practice RNAV 36L visual approach at MCO. When cleared for the visual approaching AMEBE at 3000 feet; flaps 5; 180 knots; I selected LNAV with Auto Pilot on. I then selected 500 Feet in the altitude window and VNAV. The aircraft captured LNAV and started to climb. After trying to figure out why it was climbing I disconnected the AP at 3250 feet to hand fly the approach. While getting the gear down and flaps extended tower asked if we could take a visual to 36R at approx. 1800 feet. I accepted and moved over. While the First Officer was looking up the ILS for 36R we missed the call/extension to 25 flaps. At the 1000 feet check we saw the flaps at 20 and executed a non eventful Go Around; approach and landing.When doing a visual and accepting a visual to a parallel runway both pilots should stay heads up until the landing check list is complete; then if time permits look up and tune the ILS.

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.