A DHC8-100 has a nuisance trip of the beta lockout system which required resetting a circuit breaker...

Attributes
ACN	601004
Time
Date	200311
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 153 flight time total : 15969 flight time type : 9786
ASRS Report	601004
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe non adherence : company policies non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

After engine start, I noticed that both engine manual caution lights remained illuminated, indicating that the engine electronic control units were not on line. My first officer and I suspected a nuisance trip of the beta lockout system and remembered that the flight crew was allowed to pull and reset the beta lockout circuit breaker in the nose compartment in order to reset the system and continue operation. (The beta lockout system prevents selection of the propeller ground beta range in-flight.) I shut down the #1 engine and had my first officer exit the aircraft and pull and reset the circuit breaker. After the subsequent engine start, both engine manual caution lights had extinguished and we continued with the flight uneventfully. Later in the day, when time permitted, I reread our bulletins pertaining to the beta lockout system. I then realized that I should have made a maintenance logbook entry, received the ok from our maintenance department to pull and reset the circuit breaker, and received a maintenance deferral when it was verified the engine manual caution lights had extinguished. This was the first time my first officer and I had experienced a nuisance trip of the beta lockout system, 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 problem occurred, since it had been several months since I had read through the procedure.

Original NASA ASRS Text

Title: 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.

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.

A DHC8-100 has a nuisance trip of the beta lockout system which required resetting a circuit breaker. The flight crew accomplished this task but failed to write up the discrepancy and get it cleared by maintenance.