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A B737-300 on landing the aircraft experienced severe vibration and veered to the right caused by the nose steering scissors not connected.
| Attributes | |
| ACN | 431049 |
| Time | |
| Date | 199903 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : yyc.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe |
| Experience | maintenance technician : 11 |
| ASRS Report | 431049 |
| Person 2 | |
| Affiliation | company : air carrier |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 431050 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
On mar/xa/99 another mechanic and myself were assigned the job of repacking the nose landing gear strut on aircraft xyz in ZZZ line maintenance hangar X. We completed our assigned job as per air carrier work card wvxvy. The aircraft was completed and released for service at approximately AA00 mar/xb/99. The aircraft flew in service all day mar/xb/99 and mar/xc/99. On mar/xc/99 the aircraft overnighted in XXX where an extension check of the nose landing gear was completed on mar/xd/99 the aircraft was in service until its second flight leg when they landed in burlington, vt. The nose gear torque links separated causing damage to the torque links, nose landing gear tires, and the wiring harness assembly. The job card we completed in ZZZ did not have required inspection buy back. We completed all work on the aircraft and it flew for 2 days with no problems. It could be possible that the bolt that holds the torque links together failed.
Original NASA ASRS Text
Title: A B737-300 ON LNDG THE ACFT EXPERIENCED SEVERE VIBRATION AND VEERED TO THE R CAUSED BY THE NOSE STEERING SCISSORS NOT CONNECTED.
Narrative: ON MAR/XA/99 ANOTHER MECH AND MYSELF WERE ASSIGNED THE JOB OF REPACKING THE NOSE LNDG GEAR STRUT ON ACFT XYZ IN ZZZ LINE MAINT HANGAR X. WE COMPLETED OUR ASSIGNED JOB AS PER ACR WORK CARD WVXVY. THE ACFT WAS COMPLETED AND RELEASED FOR SVC AT APPROX AA00 MAR/XB/99. THE ACFT FLEW IN SVC ALL DAY MAR/XB/99 AND MAR/XC/99. ON MAR/XC/99 THE ACFT OVERNIGHTED IN XXX WHERE AN EXTENSION CHK OF THE NOSE LNDG GEAR WAS COMPLETED ON MAR/XD/99 THE ACFT WAS IN SVC UNTIL ITS SECOND FLT LEG WHEN THEY LANDED IN BURLINGTON, VT. THE NOSE GEAR TORQUE LINKS SEPARATED CAUSING DAMAGE TO THE TORQUE LINKS, NOSE LNDG GEAR TIRES, AND THE WIRING HARNESS ASSEMBLY. THE JOB CARD WE COMPLETED IN ZZZ DID NOT HAVE REQUIRED INSPECTION BUY BACK. WE COMPLETED ALL WORK ON THE ACFT AND IT FLEW FOR 2 DAYS WITH NO PROBS. IT COULD BE POSSIBLE THAT THE BOLT THAT HOLDS THE TORQUE LINKS TOGETHER FAILED.
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.