Narrative:

On a jan/mon/95 I delivered my cessna 310 to a repair station in central florida for overhaul of my autoplt. On jan/tue/95, I picked up the aircraft and, with the repair facility owner, test flew the airplane. Everything seemed ok, after some adjustments, and I departed VFR to my home station in west palm beach, fl. I climbed to 2500 ft, turned on the autoplt, and called orlando approach for clearance through their class B airspace and radar vectors to avoid the avon park restr areas. Orlando gave me a transponder code which I set. My transponder was reported inoperative and I remained clear of orlando's airspace. I set a course on my directional gyroscope to avoid avon park. I then discovered that my directional gyroscope was precessing more than 10 degree per min which put me several mi to the west of my desired track. By xbearings on lakeland and orlando vors. I reported my position to orlando at the east edge of avon park R2401. An immediate turn to the east took me out of the area and I turned off the autoplt and navigated by the liquid compass into west palm. In the process of installing a new attitude indicator, the repair facility apparently left my directional gyroscope with little or no vacuum. Also, in the process of installing the attitude indicator, it was necessary to remove my transponder from its tray. Apparently, when it was put back, the connectors failed to make contact. Aircraft now in shop to correct these malfunctions.

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Original NASA ASRS Text

Title: UNAUTH PENETRATION OF AIRSPACE - RESTR AREA.

Narrative: ON A JAN/MON/95 I DELIVERED MY CESSNA 310 TO A REPAIR STATION IN CENTRAL FLORIDA FOR OVERHAUL OF MY AUTOPLT. ON JAN/TUE/95, I PICKED UP THE ACFT AND, WITH THE REPAIR FACILITY OWNER, TEST FLEW THE AIRPLANE. EVERYTHING SEEMED OK, AFTER SOME ADJUSTMENTS, AND I DEPARTED VFR TO MY HOME STATION IN WEST PALM BEACH, FL. I CLBED TO 2500 FT, TURNED ON THE AUTOPLT, AND CALLED ORLANDO APCH FOR CLRNC THROUGH THEIR CLASS B AIRSPACE AND RADAR VECTORS TO AVOID THE AVON PARK RESTR AREAS. ORLANDO GAVE ME A XPONDER CODE WHICH I SET. MY XPONDER WAS RPTED INOP AND I REMAINED CLR OF ORLANDO'S AIRSPACE. I SET A COURSE ON MY DIRECTIONAL GYROSCOPE TO AVOID AVON PARK. I THEN DISCOVERED THAT MY DIRECTIONAL GYROSCOPE WAS PRECESSING MORE THAN 10 DEG PER MIN WHICH PUT ME SEVERAL MI TO THE W OF MY DESIRED TRACK. BY XBEARINGS ON LAKELAND AND ORLANDO VORS. I RPTED MY POS TO ORLANDO AT THE E EDGE OF AVON PARK R2401. AN IMMEDIATE TURN TO THE EAST TOOK ME OUT OF THE AREA AND I TURNED OFF THE AUTOPLT AND NAVIGATED BY THE LIQUID COMPASS INTO WEST PALM. IN THE PROCESS OF INSTALLING A NEW ATTITUDE INDICATOR, THE REPAIR FACILITY APPARENTLY LEFT MY DIRECTIONAL GYROSCOPE WITH LITTLE OR NO VACUUM. ALSO, IN THE PROCESS OF INSTALLING THE ATTITUDE INDICATOR, IT WAS NECESSARY TO REMOVE MY XPONDER FROM ITS TRAY. APPARENTLY, WHEN IT WAS PUT BACK, THE CONNECTORS FAILED TO MAKE CONTACT. ACFT NOW IN SHOP TO CORRECT THESE MALFUNCTIONS.

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.