A DHC8-100 HAS A NUISANCE TRIP OF THE BETA LOCKOUT SYS WHICH REQUIRED RESETTING A CIRCUIT BREAKER. THE FLT CREW ACCOMPLISHED THIS TASK BUT FAILED TO WRITE UP THE DISCREPANCY AND GET IT CLRED BY MAINT.

Narrative

AFTER ENG START; I NOTICED THAT BOTH ENG MANUAL CAUTION LIGHTS REMAINED ILLUMINATED; INDICATING THAT THE ENG ELECTRONIC CTL UNITS WERE NOT ON LINE. MY FO AND I SUSPECTED A NUISANCE TRIP OF THE BETA LOCKOUT SYS AND REMEMBERED THAT THE FLT CREW WAS ALLOWED TO PULL AND RESET THE BETA LOCKOUT CIRCUIT BREAKER IN THE NOSE COMPARTMENT IN ORDER TO RESET THE SYS AND CONTINUE OP. (THE BETA LOCKOUT SYS PREVENTS SELECTION OF THE PROP GND BETA RANGE INFLT.) I SHUT DOWN THE #1 ENG AND HAD MY FO EXIT THE ACFT AND PULL AND RESET THE CIRCUIT BREAKER. AFTER THE SUBSEQUENT ENG START; BOTH ENG MANUAL CAUTION LIGHTS HAD EXTINGUISHED AND WE CONTINUED WITH THE FLT UNEVENTFULLY. LATER IN THE DAY; WHEN TIME PERMITTED; I REREAD OUR BULLETINS PERTAINING TO THE BETA LOCKOUT SYS. I THEN REALIZED THAT I SHOULD HAVE MADE A MAINT LOGBOOK ENTRY; RECEIVED THE OK FROM OUR MAINT DEPT TO PULL AND RESET THE CIRCUIT BREAKER; AND RECEIVED A MAINT DEFERRAL WHEN IT WAS VERIFIED THE ENG MANUAL CAUTION LIGHTS HAD EXTINGUISHED. THIS WAS THE FIRST TIME MY FO AND I HAD EXPERIENCED A NUISANCE TRIP OF THE BETA LOCKOUT SYS; AND NEITHER OF US HAD REMEMBERED THAT A LOGBOOK ENTRY AND DEFERRAL WERE NECESSARY. I SHOULD HAVE TAKEN THE TIME TO PULL OUT AND REVIEW THE BULLETINS WHEN THE PROB OCCURRED; SINCE IT HAD BEEN SEVERAL MONTHS SINCE I HAD READ THROUGH THE PROC.