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B767-300 flight crew reports activating stick shaker in descent at maneuvering speed with spoilers extended and turbulence present. Flaps 1 ends the warning.
| Attributes | |
| ACN | 812526 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zzz.tracon |
| State Reference | US |
| Altitude | msl single value : 14000 |
| Environment | |
| Weather Elements | Turbulence Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 210 flight time total : 14568 flight time type : 2500 |
| ASRS Report | 812526 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 120 flight time total : 7000 |
| ASRS Report | 812525 |
| Events | |
| Anomaly | inflight encounter : turbulence non adherence : company policies non adherence : far other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : stick shaker |
| Resolutory Action | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Captain; PF; was using autoplt and flight level change. Autothrottles inoperative. Using manual throttles. Descending from 15000 ft to 12000 ft. Turn to bog VOR was earlier than expected. About 2000 ft high. Light to moderate turbulence in the clouds with thunderstorms in the area. Extended speed brakes and descending; slowing to clean maneuvering speed of 203 KTS. Gross weight about 315000 pounds. Retracting speed brakes at about 206 KTS; stick shaker activation momentarily for about 15 seconds. First officer; pilot monitoring; immediately extended flaps to 1 degree. Continued retracting speed brakes to close. No further stick shaker activation. Normal approach; landing; taxi and parking. I did not enter in the logbook as I have been previously briefed of this anomaly in the computer system for the B767. We have flown this aircraft for the past week for multiple legs. First time for this activation.
Original NASA ASRS Text
Title: B767-300 FLIGHT CREW REPORTS ACTIVATING STICK SHAKER IN DESCENT AT MANEUVERING SPEED WITH SPOILERS EXTENDED AND TURBULENCE PRESENT. FLAPS 1 ENDS THE WARNING.
Narrative: CAPT; PF; WAS USING AUTOPLT AND FLT LEVEL CHANGE. AUTOTHROTTLES INOP. USING MANUAL THROTTLES. DSNDING FROM 15000 FT TO 12000 FT. TURN TO BOG VOR WAS EARLIER THAN EXPECTED. ABOUT 2000 FT HIGH. LIGHT TO MODERATE TURB IN THE CLOUDS WITH TSTMS IN THE AREA. EXTENDED SPD BRAKES AND DSNDING; SLOWING TO CLEAN MANEUVERING SPD OF 203 KTS. GROSS WT ABOUT 315000 LBS. RETRACTING SPD BRAKES AT ABOUT 206 KTS; STICK SHAKER ACTIVATION MOMENTARILY FOR ABOUT 15 SECONDS. FO; PLT MONITORING; IMMEDIATELY EXTENDED FLAPS TO 1 DEG. CONTINUED RETRACTING SPD BRAKES TO CLOSE. NO FURTHER STICK SHAKER ACTIVATION. NORMAL APCH; LNDG; TAXI AND PARKING. I DID NOT ENTER IN THE LOGBOOK AS I HAVE BEEN PREVIOUSLY BRIEFED OF THIS ANOMALY IN THE COMPUTER SYSTEM FOR THE B767. WE HAVE FLOWN THIS ACFT FOR THE PAST WK FOR MULTIPLE LEGS. FIRST TIME FOR THIS ACTIVATION.
Data retrieved from NASA's ASRS site as of May 2009 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.