Air carrier captain reported refusing the aircraft due to unresolved electrical issues.

Attributes
ACN	1553421
Time
Date	201806
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Rudder Control System
Person 1
Function	Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 51 Flight Crew Total 10000 Flight Crew Type 695
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence

Narrative:

Experienced yaw damper failure. Aircraft was difficult to land in crosswind. Entered maintenance discrepancy for yaw damper failure. Yaw damper passed [maintenance] check and no reason for failure was learned. Flight planned back into ZZZ through turbulent conditions which should be avoided with yaw damper inoperative. While maintenance trouble shot yaw damper; a popped flight recorder flight position sensor circuit breaker was discovered. Significant trouble shooting yielded no results. Mechanics; including the supervisor; refused to release the aircraft until the electrical fault was resolved. [Maintenance management] over rode the local mechanics and directed the deferral of the flight recorder. Because of the unexplained yaw damper failure and the unexplained/unresolved electrical fault I refused the aircraft.

Original NASA ASRS Text

Title: Air Carrier Captain reported refusing the aircraft due to unresolved electrical issues.

Narrative: Experienced yaw damper failure. Aircraft was difficult to land in crosswind. Entered maintenance discrepancy for yaw damper failure. Yaw damper passed [maintenance] check and no reason for failure was learned. Flight planned back into ZZZ through turbulent conditions which should be avoided with yaw damper inoperative. While maintenance trouble shot yaw damper; a popped Flight Recorder flight position sensor circuit breaker was discovered. Significant trouble shooting yielded no results. Mechanics; including the supervisor; refused to release the aircraft until the electrical fault was resolved. [Maintenance management] over rode the local mechanics and directed the deferral of the flight recorder. Because of the unexplained yaw damper failure and the unexplained/unresolved electrical fault I refused the aircraft.

Data retrieved from NASA's ASRS site 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.