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Air carrier large transport experiences partial loss of aircraft control upon landing due to nose wheel torque link (steering) pin being disconnected.
| Attributes | |
| ACN | 148000 |
| Time | |
| Date | 199006 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : mke |
| State Reference | WI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8000 flight time type : 2000 |
| ASRS Report | 148000 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Airport |
| Air Traffic Incident | other |
Narrative:
While decelerating after normal landing, we experienced severe latitude vibrations and loss of nose wheel steering. After stopping, we discovered the nose gear torque link disconnected and pin missing. The pin was later found on runway. During deceleration, suspecting brake, tire or wheel problem, used full reverse thrust rather than brakes. Limited steering was available with differential braking, but not much! Suspect torque link pin was improperly secured by ground personnel at departure city after pushback. One possibility to prevent recurrence is to discontinue the practice of disconnecting the torque link prior to pushback.
Original NASA ASRS Text
Title: ACR LGT EXPERIENCES PARTIAL LOSS OF ACFT CTL UPON LNDG DUE TO NOSE WHEEL TORQUE LINK (STEERING) PIN BEING DISCONNECTED.
Narrative: WHILE DECELERATING AFTER NORMAL LNDG, WE EXPERIENCED SEVERE LAT VIBRATIONS AND LOSS OF NOSE WHEEL STEERING. AFTER STOPPING, WE DISCOVERED THE NOSE GEAR TORQUE LINK DISCONNECTED AND PIN MISSING. THE PIN WAS LATER FOUND ON RWY. DURING DECELERATION, SUSPECTING BRAKE, TIRE OR WHEEL PROB, USED FULL REVERSE THRUST RATHER THAN BRAKES. LIMITED STEERING WAS AVAILABLE WITH DIFFERENTIAL BRAKING, BUT NOT MUCH! SUSPECT TORQUE LINK PIN WAS IMPROPERLY SECURED BY GND PERSONNEL AT DEP CITY AFTER PUSHBACK. ONE POSSIBILITY TO PREVENT RECURRENCE IS TO DISCONTINUE THE PRACTICE OF DISCONNECTING THE TORQUE LINK PRIOR TO PUSHBACK.
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.