First officer of air carrier large transport aircraft experienced an aircraft 'stick shaker' stall a...

Attributes
ACN	216404
Time
Date	199207
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 18000 flight time type : 3000
ASRS Report	216404
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On 7/wed/92 flight number, on nickel 2 arrival, under IMC with the autoplt on, I departed elmos intersection on a vector heading for approach to 11L. I was cleared descended to 4000 ft, slowed to 170 KTS. I was level at 4000 ft, 170 KTS, flaps 2 carrying power. They gave us 2 turns. I was in this confign for approximately 1 min. They gave us a turn to final and cleared for the approach. As I turned I started to get a stick shaker at 15 degree bank. We did not get a stick shaker at the other 2 turns we were at the same speed, power setting, and altitude. There was no altitude or airspeed loss. There was no buffet or stall -- just the stick shaker. I immediately added power, rolled the wings level, and knocked off the autoplt. At the same time I was doing this, the captain said, 'I've got it. Go around power.' he put the flaps to 15 causing the aircraft to balloon. Then he landed. At the time the bug speed for vzf (0 flaps) was 199. My airspeed never got below 170, nor was there any loss of altitude. In my opinion the calculated speeds are too low -- the company had done this in the interest of fuel conservation. This also could have been a premature stick shaker.

Original NASA ASRS Text

Title: FO OF ACR LGT ACFT EXPERIENCED AN ACFT 'STICK SHAKER' STALL APCHING INDICATION DURING TURN TO FINAL.

Narrative: ON 7/WED/92 FLT NUMBER, ON NICKEL 2 ARR, UNDER IMC WITH THE AUTOPLT ON, I DEPARTED ELMOS INTXN ON A VECTOR HDG FOR APCH TO 11L. I WAS CLRED DSNDED TO 4000 FT, SLOWED TO 170 KTS. I WAS LEVEL AT 4000 FT, 170 KTS, FLAPS 2 CARRYING PWR. THEY GAVE US 2 TURNS. I WAS IN THIS CONFIGN FOR APPROX 1 MIN. THEY GAVE US A TURN TO FINAL AND CLRED FOR THE APCH. AS I TURNED I STARTED TO GET A STICK SHAKER AT 15 DEG BANK. WE DID NOT GET A STICK SHAKER AT THE OTHER 2 TURNS WE WERE AT THE SAME SPD, PWR SETTING, AND ALT. THERE WAS NO ALT OR AIRSPD LOSS. THERE WAS NO BUFFET OR STALL -- JUST THE STICK SHAKER. I IMMEDIATELY ADDED PWR, ROLLED THE WINGS LEVEL, AND KNOCKED OFF THE AUTOPLT. AT THE SAME TIME I WAS DOING THIS, THE CAPT SAID, 'I'VE GOT IT. GAR PWR.' HE PUT THE FLAPS TO 15 CAUSING THE ACFT TO BALLOON. THEN HE LANDED. AT THE TIME THE BUG SPD FOR VZF (0 FLAPS) WAS 199. MY AIRSPD NEVER GOT BELOW 170, NOR WAS THERE ANY LOSS OF ALT. IN MY OPINION THE CALCULATED SPDS ARE TOO LOW -- THE COMPANY HAD DONE THIS IN THE INTEREST OF FUEL CONSERVATION. THIS ALSO COULD HAVE BEEN A PREMATURE STICK SHAKER.

Data retrieved from NASA's ASRS site as of July 2007 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.

First officer of air carrier large transport aircraft experienced an aircraft 'stick shaker' stall approaching indication during turn to final.