B747 flight crew reported receiving a stick shaker when they lost situational awareness while dealin...

Attributes
ACN	1319659
Time
Date	201512
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Autoflight System
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 160 Flight Crew Total 9000 Flight Crew Type 3000
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 211 Flight Crew Total 23500 Flight Crew Type 990
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

We were on a 25 mile downwind. We were at 170 KIAS; flaps 20; gear up; descending through 4000 feet for 3000 feet. We were given a turn to 090 for base leg. During the turn and descent; PF must have inadvertently hit the toga switches on the throttles. Airplane went into a 10-12 degree nose up attitude with go-around thrust. PF and pm announced the toga status; and PF attempted to disengage both autopilot and autothrottles. Autopilot disengaged normally; and PF pushed over as airplane reached ~4200 feet. Autothrottles did not disengage; so PF manually held them in idle in an attempt to control airspeed. PF announced 'autothrottles will not disengage'; so pm turned off the autothrottle switch on the MCP. As PF tried to level the aircraft at 3000 feet (at this time the aircraft had descended to ~2900 feet); the airspeed slowed to ~156 KIAS (the top of the yellow band) and the crew got a brief stick shaker. PF immediately recovered by advancing the throttles to full power; rolled wings level and climbing back to 3000 feet. Automation was restored; ATC cleared the crew for the approach approximately 25 miles from the field; and the rest of the flight continued uneventfully.

Original NASA ASRS Text

Title: B747 flight crew reported receiving a stick shaker when they lost situational awareness while dealing with the inadvertent selection of TOGA mode while on approach.

Narrative: We were on a 25 mile downwind. We were at 170 KIAS; flaps 20; gear up; descending through 4000 feet for 3000 feet. We were given a turn to 090 for base leg. During the turn and descent; PF must have inadvertently hit the TOGA switches on the throttles. Airplane went into a 10-12 degree nose up attitude with Go-Around thrust. PF and PM announced the TOGA status; and PF attempted to disengage both autopilot and autothrottles. Autopilot disengaged normally; and PF pushed over as airplane reached ~4200 feet. Autothrottles did not disengage; so PF manually held them in idle in an attempt to control airspeed. PF announced 'autothrottles will not disengage'; so PM turned off the autothrottle switch on the MCP. As PF tried to level the aircraft at 3000 feet (at this time the aircraft had descended to ~2900 feet); the airspeed slowed to ~156 KIAS (the top of the yellow band) and the crew got a brief stick shaker. PF immediately recovered by advancing the throttles to full power; rolled wings level and climbing back to 3000 feet. Automation was restored; ATC cleared the crew for the approach approximately 25 miles from the field; and the rest of the flight continued uneventfully.

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.

B747 flight crew reported receiving a stick shaker when they lost situational awareness while dealing with the inadvertent selection of toga mode while on approach.