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An air carrier flight crew flying a B727 to atl experience a difference in airspeed indications between captain and copilot instruments later resulting in a stick shaker event while slowing to maneuver for their approach.
| Attributes | |
| ACN | 451623 |
| Time | |
| Date | 199910 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl.airport |
| State Reference | GA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 160 flight time total : 11000 flight time type : 4000 |
| ASRS Report | 451623 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other anomaly |
| Independent Detector | other flight crewa other flight crewb other other : 3 |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Noted 7 KT difference between captain's and first officer's IAS on takeoff which continued to show at cruise. First officer flying chose to use speed brake to increase rate of descent while turning base to final. With 20 degree bank and IAS of 207 KTS (captain) and 217 KTS (first officer) got stick shaker when flap 0 degrees maneuver speed was 197 KTS.
Original NASA ASRS Text
Title: AN ACR FLC FLYING A B727 TO ATL EXPERIENCE A DIFFERENCE IN AIRSPD INDICATIONS BTWN CAPT AND COPLT INSTS LATER RESULTING IN A STICK SHAKER EVENT WHILE SLOWING TO MANEUVER FOR THEIR APCH.
Narrative: NOTED 7 KT DIFFERENCE BTWN CAPT'S AND FO'S IAS ON TKOF WHICH CONTINUED TO SHOW AT CRUISE. FO FLYING CHOSE TO USE SPD BRAKE TO INCREASE RATE OF DSCNT WHILE TURNING BASE TO FINAL. WITH 20 DEG BANK AND IAS OF 207 KTS (CAPT) AND 217 KTS (FO) GOT STICK SHAKER WHEN FLAP 0 DEGS MANEUVER SPD WAS 197 KTS.
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.