MIDWEST AERO CLUB LLC.

UPON OVERHAUL OF A MAIN WHEEL ASSEMBLY P/N: 3-1609-1 S/N: 0919 AT AIRCRAFT SPECIALTIES IN OMAHA, NE ASI NOTICED THE WRONG P/N: LOCK RING FOR THE WHEEL HAVES WAS INSTALLED. IT HAD P/N: 245-633 WHEN THE CORRECT P/N: IS 245-616. THE CORRECT PART WAS ORDERED AND INSTALLED DURING OVERHAUL. THE WHEEL ASSEMBLY WAS ORIGINAL EQUIPMENT ON THE AIRCRAFT FROM DELIVERY AND THE ASSEMBLY HAS ONLY BEEN OVERHAULED HERE AT BJI AND ASI. IT WAS DISCOVERED THAT THE WRONG P/N IS FOR A CITATION SOVEREIGN (MODEL 680) MAIN WHEEL AND BELIEVED TO BEEN INSTALLED ON THE WHEEL FROM NEW BY BF GOODRICH. BOTH PARTS LOOK IDENTICAL (ACCEPT THE P/N) AND THERE IS NO REQUIREMENT TO INSPECT THIS RING AT ANY INSPECTION. BJI DOES NOT AND HAS NEVER OWNED A SOVEREIGN AND THE DOM ON THE ORIGINAL RING (WRONG P/N) AND WHEEL ARE WITHIN 2 MONTHS IN 2007. BJI NOTIFIED BOMBARDIER ABOUT THIS AND THEY REACHED OUT TO THE PART MANUFACTURE AND ASI TO NOTIFY THEM OF THE ISSUE THAT WAS DISCOVERED.

DURING APPROACH, CREW SELECTED GEAR DOWN AND RECEIVED BOTH MAIN DOOR RED INDICATIONS AND NO GREEN DOWN AND LOCK INDICATIONS. RETURNED TO DEPARTURE AND SELECTED GEAR DOWN WITH EMERGENCY HYD EXTENSION AND RECEIVED THREE GREEN DOWN AND LOCKED LIGHTS. ACFT LANDED UNEVENTFULLY, MAINTENANCE REPLACED BOTH MAIN GEAR DOOR ACTUATOR PROXIMITY SWITCHES ALONG WITH THE CONNECTORS AFTER TROUBLESHOOTING.

AT 13,000 FT, PILOTS REPORTED WHITE CAS MESSAGE LT AND RT GENERATORS AND LT AND RT BATTERIES OFF LINE. STARTED THE APU TO PUT THE APU GENERATOR ON LINE, APU GENERATOR INDICATOR SHOWED APU GENERATOR NOT ON LINE. DURING DESCENT BACK TO AIRPORT. THE RT MFG AND PFD WAS LOST AND AUTO-PILOT CAME OFF LINE. RESET AND THE AUTO-PILOT, MFD AND PFD RETURNED ON LINE. LANDING WAS UNEVENTFUL, ACFT LANDED WITH NO PROBLEMS. INSTALLED UPDATED CIRCUIT BOARDS PN 320GC02Y06, 970GC02Y06, AND 925GC02Y06 IN THE DCPC (DC POWER CENTER LT, RT AND AUXILIARY) IAW SB 100-24-15, PART A, PART C, PARA 2A, 2B, 2F, 2G MODIFICATION DC POWER CENTER SYSTEM REPLACEMENT OF CIRCUIT BOARDS. OPS AND EVALUATION CKS CONDUCTED AND RESULTS CHECKED GOOD. COMPLIED WITH ON 2/27/2011.

AT 13,000 FT, PILOTS REPORTED WHITE CAS MESSAGE LT AND RT GENERATORS AND LT AND RT BATTERIES OFF LINE. STARTED THE APU TO PUT THE APU GENERATOR ON LINE, APU GENERATOR INDICATOR SHOWED APU GENERATOR NOT ON LINE. DURING DESCENT BACK TO AIRPORT. THE RT MFG AND PFD WAS LOST AND AUTO-PILOT CAME OFF LINE. RESET AND THE AUTO-PILOT, MFD AND PFD RETURNED ON LINE. LANDING WAS UNEVENTFUL, ACFT LANDED WITH NO PROBLEMS. INSTALLED UPDATED CIRCUIT BOARDS PN 320GC02Y06, 970GC02Y06, AND 925GC02Y06 IN THE DCPC (DC POWER CENTER LT, RT AND AUXILIARY) IAW SB 100-24-15, PART A, PART C, PARA 2A, 2B, 2F, 2G MODIFICATION DC POWER CENTER SYSTEM REPLACEMENT OF CIRCUIT BOARDS. OPS AND EVALUATION CKS CONDUCTED AND RESULTS CHECKED GOOD. COMPLIED WITH ON 2/27/2011.