A B737-300 NOSE GEAR STEERING COLLARS AND BUSHINGS WERE IMPROPERLY INSTALLED BY AN UNQUALIFIED TECHNICIAN.

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ON JUL/FRI/03 AT XB30; I WAS INFORMED BY MY SUPVR THAT THERE MAY HAVE BEEN A PROB WITH THE INSTALLATION OF THE STEERING COLLAR BUSHING THAT WAS PART OF MY WORK ASSIGNMENT ON JUL/SUN/03 (3RD LIFE; TIME LIFE COMPONENT; ON THE NOSE GEAR) ON ACFT X. I WAS TRYING TO EVALUATE WHAT MAY HAVE LED UP TO A POSSIBLE OVERSIGHT ON THE CORRECT POSITIONING OF THE BEARING. THERE WERE SEVERAL EVENTS THAT COULD HAVE CONTRIBUTED TO THE OVERSIGHT. 1) I HAD JUST RETURNED TO WORK AFTER ATTENDING A FUNERAL. 2) MY WIFE IS VERY DISTRAUGHT OVER THE DEATH OF HER MOTHER. 3) MY WIFE IS ILL. 4) I COMMUTE TO WORK AND MY FLT WAS CANCELLED; WHICH CAUSED ME TO ARRIVE AT WORK 20 MINS LATE. 5) I HAVE NEVER PERFORMED ANY MAINT ON ANY GEAR OTHER THAN CHANGING TIRES AND SVCING THE STRUTS. 6) LACK OF SUPERVISION (SINCE THIS WAS A CRITICAL JOB AND AS I HAVE BEEN TOLD BY SEVERAL SENIOR MECHS THAT IT IS ALSO A 2 MAN JOB). 7) DISTR -- SINCE IT TAKES 2 PEOPLE TO INSTALL THE BEARING. 8) BEING RUSHED FOR TIME. 9) I KNEW THAT THIS ASSIGNMENT HAD TO BE COMPLETED FOR A FLT IN THE MORNING.