Emb-145LR first officer reported receiving a stick shaker in the landing pattern when the captain (f...

Narrative:

We were cleared for the visual approach; planning a flaps 45 landing. We were on a right base. [Captain] slowed to 145 knots and called for flaps 45. I selected flaps 45. [Captain] then said 'give me my ILS'. I thought she was requesting a pvor because that is our normal operating procedure. I went heads down and gave her a pvor. When I returned to the pfd we were at the top of the red tape on the IAS and in a right turn base to final. I exclaimed '[captain]; watch your speed'. At that point the shaker was activated. [Captain] added power pitched down and leveled the bank some. The aircraft was stabilized and the remainder of the approach was flown in a stabilized manner. Once stabilized in a cross check I noticed her course on her ILS was not properly aligned. I reached over and aligned her course.I noticed the airspeed deviation and brought it to [captain]'s attention immediately. Our speed was at 107-108 knots approximately 20 knots below vref.[captain] did not increase the thrust after getting flaps 45. I was heads down and did not notice the airspeed deviation until just before the shaker.power was added; the nose was pitched down and the bank angle was reduced.this was classic getting too slow on base to final. It went unnoticed by myself because I was heads down. Now when flaps are called for in landing (especially 45 degrees). I do not leave the pfd until I see that the pilot flying has stabilized the speed.

Original NASA ASRS Text

Title: EMB-145LR First Officer reported receiving a stick shaker in the landing pattern when the Captain (flying pilot) allowed speed to drop following flap extension.

Narrative: We were cleared for the visual approach; planning a flaps 45 landing. We were on a right base. [Captain] slowed to 145 knots and called for flaps 45. I selected flaps 45. [Captain] then said 'give me my ILS'. I thought she was requesting a PVOR because that is our normal operating procedure. I went heads down and gave her a PVOR. When I returned to the PFD we were at the top of the red tape on the IAS and in a right turn base to final. I exclaimed '[Captain]; watch your speed'. At that point the shaker was activated. [Captain] added power pitched down and leveled the bank some. The aircraft was stabilized and the remainder of the approach was flown in a stabilized manner. Once stabilized in a cross check I noticed her course on her ILS was not properly aligned. I reached over and aligned her course.I noticed the airspeed deviation and brought it to [Captain]'s attention immediately. Our speed was at 107-108 knots approximately 20 knots below Vref.[Captain] did not increase the thrust after getting flaps 45. I was heads down and did not notice the airspeed deviation until just before the shaker.Power was added; the nose was pitched down and the bank angle was reduced.This was classic getting too slow on base to final. It went unnoticed by myself because I was heads down. Now when flaps are called for in landing (especially 45 degrees). I do not leave the PFD until I see that the pilot flying has stabilized the speed.

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.

Attributes
ACN	1432981
Time
Date	201611
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 230 Flight Crew Total 3000 Flight Crew Type 250
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Emb-145LR first officer reported receiving a stick shaker in the landing pattern when the captain (flying pilot) allowed speed to drop following flap extension.