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B767 PIC cites a 'nuisance stick shaker' as the reason for a heading track deviation while radar vectoring for an ILS approach into lhr.
| Attributes | |
| ACN | 318982 |
| Time | |
| Date | 199510 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lhr |
| State Reference | FO |
| Altitude | msl bound lower : 2500 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lhr tower : bwi |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other descent : approach |
| Route In Use | enroute : on vectors enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 318982 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure non adherence other other anomaly other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On approach runway 27R at lhr, autoplt on, about a 20 degree bank intercepting runway 27R localizer. ATC asked us to slow to 180 KTS while descending to 2500 ft. Minimum clean speed was 214 KTS from the FMC, IAS was about 214 KTS plus or minus. Bug selected to 180 KTS, flaps at 1 degree. The stick shaker activated for no apparent reason. Autoplt was disconnected, wings leveled. The shaker stopped, IAS still about 190 KTS. During this maneuver we went through the runway 27R localizer and corrected back to the right. No other traffic was observed. The controller apparently noted our going through the localizer and we told him we had the runway in sight, and he cleared us for a visual approach to runway 27R. Everything was normal as flaps were extended on schedule. ATC did not mention anything about going through the localizer. Whereas the problem was transient, about 5 seconds, I did not mention the shaker to the controller.
Original NASA ASRS Text
Title: B767 PIC CITES A 'NUISANCE STICK SHAKER' AS THE REASON FOR A HDG TRACK DEV WHILE RADAR VECTORING FOR AN ILS APCH INTO LHR.
Narrative: ON APCH RWY 27R AT LHR, AUTOPLT ON, ABOUT A 20 DEG BANK INTERCEPTING RWY 27R LOC. ATC ASKED US TO SLOW TO 180 KTS WHILE DSNDING TO 2500 FT. MINIMUM CLEAN SPD WAS 214 KTS FROM THE FMC, IAS WAS ABOUT 214 KTS PLUS OR MINUS. BUG SELECTED TO 180 KTS, FLAPS AT 1 DEG. THE STICK SHAKER ACTIVATED FOR NO APPARENT REASON. AUTOPLT WAS DISCONNECTED, WINGS LEVELED. THE SHAKER STOPPED, IAS STILL ABOUT 190 KTS. DURING THIS MANEUVER WE WENT THROUGH THE RWY 27R LOC AND CORRECTED BACK TO THE R. NO OTHER TFC WAS OBSERVED. THE CTLR APPARENTLY NOTED OUR GOING THROUGH THE LOC AND WE TOLD HIM WE HAD THE RWY IN SIGHT, AND HE CLRED US FOR A VISUAL APCH TO RWY 27R. EVERYTHING WAS NORMAL AS FLAPS WERE EXTENDED ON SCHEDULE. ATC DID NOT MENTION ANYTHING ABOUT GOING THROUGH THE LOC. WHEREAS THE PROB WAS TRANSIENT, ABOUT 5 SECONDS, I DID NOT MENTION THE SHAKER TO THE CTLR.
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.