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Controller assigned a left turn to intercept the localizer just before localizer intercept. The PF heading selected the assigned left turn and also approach mode. The aircraft turned to the right instead of the left. The PF disconnected the approach mode and selected the left turn. The localizer overshoot prompted the controller to comment about the right turn and reassign an intercept heading.
| Attributes | |
| ACN | 322440 |
| Time | |
| Date | 199512 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lhr |
| State Reference | FO |
| Aircraft 1 | |
| Controlling Facilities | tracon : lhr |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 322440 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 322706 |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
On base leg to runway 9L at lhr. Lhr controller gave us left turn to 090 degrees to intercept the localizer. I observed the captain select 090 degrees and pull heading select knob and arm the approach mode. The aircraft immediately turn to the right instead of to the left. Captain re-engaged the heading mode and turned back to the left. But the autoplt turn to the right had made us overshoot the localizer. We were correcting back when the lhr controller called and commanded a left turn to 080 degrees and he commented we had appeared to turn to the right. Engaged approach mode and made uneventful landing. It would have been better if we had an ATC telephone number to call so that we could have debriefed the controller or a number to call locally to leave information instead of waiting until today to debrief.
Original NASA ASRS Text
Title: CTLR ASSIGNED A L TURN TO INTERCEPT THE LOC JUST BEFORE LOC INTERCEPT. THE PF HDG SELECTED THE ASSIGNED L TURN AND ALSO APCH MODE. THE ACFT TURNED TO THE R INSTEAD OF THE L. THE PF DISCONNECTED THE APCH MODE AND SELECTED THE L TURN. THE LOC OVERSHOOT PROMPTED THE CTLR TO COMMENT ABOUT THE R TURN AND REASSIGN AN INTERCEPT HDG.
Narrative: ON BASE LEG TO RWY 9L AT LHR. LHR CTLR GAVE US L TURN TO 090 DEGS TO INTERCEPT THE LOC. I OBSERVED THE CAPT SELECT 090 DEGS AND PULL HDG SELECT KNOB AND ARM THE APCH MODE. THE ACFT IMMEDIATELY TURN TO THE R INSTEAD OF TO THE L. CAPT RE-ENGAGED THE HDG MODE AND TURNED BACK TO THE L. BUT THE AUTOPLT TURN TO THE R HAD MADE US OVERSHOOT THE LOC. WE WERE CORRECTING BACK WHEN THE LHR CTLR CALLED AND COMMANDED A L TURN TO 080 DEGS AND HE COMMENTED WE HAD APPEARED TO TURN TO THE R. ENGAGED APCH MODE AND MADE UNEVENTFUL LNDG. IT WOULD HAVE BEEN BETTER IF WE HAD AN ATC TELEPHONE NUMBER TO CALL SO THAT WE COULD HAVE DEBRIEFED THE CTLR OR A NUMBER TO CALL LOCALLY TO LEAVE INFO INSTEAD OF WAITING UNTIL TODAY TO DEBRIEF.
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.