Narrative:

Aircraft arrived at ZZZ with left dc generator inoperative at some prior time during the day and was parked. Parts for repair arrived at approximately XA45. Air carrier's maintenance control was contacted and I was directed to replace dc power panel first and inspect/replace starter/generator if needed after panel repair and replacement. Work was started at approximately XB15 and interrupted at approximately XB45 to service oxygen on a different aircraft. Repairs were restarted approximately XC15. Repair and replacement of panel was continued until completed at approximately XD30. During this period of time, the wind was blowing at 30-40 mph and temperature was in low 40's on the ramp where work was being performed. When completed with panel repair and replacement, I attempted to contact a person run qualified on this aircraft type until XZ00 when a person arrived at location. Aircraft was run up, dc electrical system operated normally at this time. Due to workload of person who ran aircraft, and time limits, no inspection was performed by second person. Access panel was closed and paperwork completed. At takeoff, landing gear would not retract due to a wire not being connected to the dc power panel. Aircraft returned to gate at which time it was towed to a hangar, jacked, and the wire connected, and was operations checked good. Aircraft was returned to service at that time. Aircraft later departed and once again returned to airport for dc power failure at which time a generator control unit was replaced and system was operations checked normal and aircraft departed. Personnel factors affecting the unconnected wire were fatigue, WX, no training on this type of aircraft, poor to non existent communications with run qualified personnel.

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Original NASA ASRS Text

Title: A BEECH 1900 WAS DISPATCHED AND RETURNED TO THE FIELD TWICE, DUE TO INCORRECT AND INCOMPLETE REPAIR TO THE DC ELECTRICAL SYS.

Narrative: ACFT ARRIVED AT ZZZ WITH L DC GENERATOR INOP AT SOME PRIOR TIME DURING THE DAY AND WAS PARKED. PARTS FOR REPAIR ARRIVED AT APPROX XA45. ACR'S MAINT CTL WAS CONTACTED AND I WAS DIRECTED TO REPLACE DC PWR PANEL FIRST AND INSPECT/REPLACE STARTER/GENERATOR IF NEEDED AFTER PANEL REPAIR AND REPLACEMENT. WORK WAS STARTED AT APPROX XB15 AND INTERRUPTED AT APPROX XB45 TO SVC OXYGEN ON A DIFFERENT ACFT. REPAIRS WERE RESTARTED APPROX XC15. REPAIR AND REPLACEMENT OF PANEL WAS CONTINUED UNTIL COMPLETED AT APPROX XD30. DURING THIS PERIOD OF TIME, THE WIND WAS BLOWING AT 30-40 MPH AND TEMP WAS IN LOW 40'S ON THE RAMP WHERE WORK WAS BEING PERFORMED. WHEN COMPLETED WITH PANEL REPAIR AND REPLACEMENT, I ATTEMPTED TO CONTACT A PERSON RUN QUALIFIED ON THIS ACFT TYPE UNTIL XZ00 WHEN A PERSON ARRIVED AT LOCATION. ACFT WAS RUN UP, DC ELECTRICAL SYS OPERATED NORMALLY AT THIS TIME. DUE TO WORKLOAD OF PERSON WHO RAN ACFT, AND TIME LIMITS, NO INSPECTION WAS PERFORMED BY SECOND PERSON. ACCESS PANEL WAS CLOSED AND PAPERWORK COMPLETED. AT TKOF, LNDG GEAR WOULD NOT RETRACT DUE TO A WIRE NOT BEING CONNECTED TO THE DC PWR PANEL. ACFT RETURNED TO GATE AT WHICH TIME IT WAS TOWED TO A HANGAR, JACKED, AND THE WIRE CONNECTED, AND WAS OPS CHKED GOOD. ACFT WAS RETURNED TO SVC AT THAT TIME. ACFT LATER DEPARTED AND ONCE AGAIN RETURNED TO ARPT FOR DC PWR FAILURE AT WHICH TIME A GENERATOR CTL UNIT WAS REPLACED AND SYS WAS OPS CHKED NORMAL AND ACFT DEPARTED. PERSONNEL FACTORS AFFECTING THE UNCONNECTED WIRE WERE FATIGUE, WX, NO TRAINING ON THIS TYPE OF ACFT, POOR TO NON EXISTENT COMS WITH RUN QUALIFIED PERSONNEL.

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.