An avro arj 85 was returned to service in non compliance with the elevator damper circuit breaker pulled and collared, but with no logbook documentation.

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Attributes
ACN	614405
Time
Date	200404
Day	Fri
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
Operator	common carrier : air carrier
Make Model Name	Avro RJ85
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : fcc
Experience	maintenance avionics : 8
ASRS Report	614405
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : non compliance with mel maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : manuals contributing factor : schedule pressure contributing factor : work cards performance deficiency : inspection performance deficiency : fault isolation performance deficiency : scheduled maintenance performance deficiency : repair performance deficiency : unqualified personnel performance deficiency : logbook entry performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance Aircraft Environmental Factor Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Prior to towing aircraft out of the hangar, circuit breakers were checked to make sure that they were all set. Found that circuit breaker K14 (elevator damper) was pulled and collared. I checked the aircraft logbook and deferred maintenance log. No entries were logged for above mentioned breaker. It was decided to attempt an operations check of the elevator dampening system. Upon removing collar and resetting breaker, the circuit breaker popped immediately. After troubleshooting system, found that a diode (CE7) was installed backwards. This allowed a direct short to ground. I replaced the diode and completed the operations check with no defects noted and the aircraft was released for service. The elevator dampening system was just installed per an mcd and there is no deferral at this time for it. The mcd was completed in ZZZ1. Also upon reviewing wiring diagram (27-34-01 figure 1) there is no possible way this breaker would stay set with the diode installed incorrectly. Also noted was that airspeed limitation for pitch oscillation was removed from the cockpit.

Original NASA ASRS Text

Title: AN AVRO ARJ 85 WAS RETURNED TO SVC IN NON COMPLIANCE WITH THE ELEVATOR DAMPER CIRCUIT BREAKER PULLED AND COLLARED, BUT WITH NO LOGBOOK DOCUMENTATION.

Narrative: PRIOR TO TOWING ACFT OUT OF THE HANGAR, CIRCUIT BREAKERS WERE CHKED TO MAKE SURE THAT THEY WERE ALL SET. FOUND THAT CIRCUIT BREAKER K14 (ELEVATOR DAMPER) WAS PULLED AND COLLARED. I CHKED THE ACFT LOGBOOK AND DEFERRED MAINT LOG. NO ENTRIES WERE LOGGED FOR ABOVE MENTIONED BREAKER. IT WAS DECIDED TO ATTEMPT AN OPS CHK OF THE ELEVATOR DAMPENING SYS. UPON REMOVING COLLAR AND RESETTING BREAKER, THE CIRCUIT BREAKER POPPED IMMEDIATELY. AFTER TROUBLESHOOTING SYS, FOUND THAT A DIODE (CE7) WAS INSTALLED BACKWARDS. THIS ALLOWED A DIRECT SHORT TO GND. I REPLACED THE DIODE AND COMPLETED THE OPS CHK WITH NO DEFECTS NOTED AND THE ACFT WAS RELEASED FOR SVC. THE ELEVATOR DAMPENING SYS WAS JUST INSTALLED PER AN MCD AND THERE IS NO DEFERRAL AT THIS TIME FOR IT. THE MCD WAS COMPLETED IN ZZZ1. ALSO UPON REVIEWING WIRING DIAGRAM (27-34-01 FIGURE 1) THERE IS NO POSSIBLE WAY THIS BREAKER WOULD STAY SET WITH THE DIODE INSTALLED INCORRECTLY. ALSO NOTED WAS THAT AIRSPD LIMITATION FOR PITCH OSCILLATION WAS REMOVED FROM THE COCKPIT.

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.