ON CLBOUT; ACFT EXPERIENCES ELECTRICAL PROBS. MUST EXECUTE GEAR UP LNDG.

Date: 1993-04 · Aircraft: Small Aircraft; Low Wing; 2 Eng; Retractable Gear

Anomalies: aircraft-equipment-problem-critical

Synopsis

ON CLBOUT; ACFT EXPERIENCES ELECTRICAL PROBS. MUST EXECUTE GEAR UP LNDG.

Narrative

ON CLBOUT OF ST JOSEPH; MO; THE ACFT BEGAN EXPERIENCING ELECTRICAL PROBS WHICH AFFECTED ANY GAUGE OR PIECE OF EQUIP PWRED BY ELECTRICITY. CHKLIST PROCS WERE FOLLOWED. THE ELECTRICAL PWR WAS RESET TO NORMAL OP AND THE CLBOUT CONTINUED. 2 MINS LATER THE SAME THING HAPPENED. THE CHKLIST AGAIN WAS FOLLOWED AND PWR WAS RESTORED. THIS TIME THE R GENERATOR SWITCH WAS NOT TURNED BACK ON SINCE IT HAD TRIPPED OFF LINE TWICE. WITHIN 90 SECONDS THE BUS TIE RELAY FAILED AND DROPPED THE L GENERATOR OFF THE SYS. THE FLUCTUATIONS CONTINUED IN THE ELECTRICAL SYS. ALL SWITCHES EXCEPT FOR THE #1 COM/NAV RADIO WERE TURNED OFF. A TURN BACK TO STJ WAS MADE. AT THIS POINT; THE LNDG GEAR SWITCH WAS THROWN DOWN. THE NOSE GEAR DOOR CAME OPEN BUT THAT'S ALL. THE BATTERY WAS TURNED OFF TO CONSERVE WHAT WAS LEFT SINCE SOMETHING WAS DRAWING JUICE AT A GREAT RATE. THE CHKLIST WAS CONSULTED AND THE MANUAL GEAR LOWERING CHKLIST WAS PERFORMED. AFTER 3-4 REVOLUTIONS; THE HANDLE BECAME NEARLY IMPOSSIBLE TO MOVE. I BEGAN CIRCLING THE FIELD AND TRIED TO RAISE SOME ATTN. THIS WAS TO NO AVAIL. I DIDN'T HAVE ENOUGH BATTERY TO OPERATE THE RADIO AND NO ONE SAW ME ON THE GND. I CIRCLED OVER AND AROUND RWY 17 AND THE RAMP AREA TRYING IN VAIN TO GET THE GEAR DOWN MANUALLY AND ELECTRICALLY BY ATTEMPTING TO RESET A GENERATOR AND GET THE BUS TIE CLOSED. THESE ATTEMPTS FAILED. AS DARKNESS GOT CLOSER; A PLOWED FIELD WAS PICKED E OF THE N/S PARALLEL TXWY E OF RWY 17. A 3 MI STRAIGHT-IN WAS FLOWN. THE PROPS WERE FEATHERED JUST PRIOR TO TOUCHDOWN. AFTER TOUCHDOWN; THE ACFT SLID STRAIGHT AHEAD 50-75 FT. THE ENGS; FUEL SELECTORS AND ANY REMAINING SWITCHES WERE TURNED OFF. I EGRESSED THE ACFT AND VISUALLY INSPECTED FOR DAMAGE. NO RUPTURES OF FUEL LEAKS WERE FOUND AND THE ACFT WAS SECURED. DAMAGE HAS BEEN ASSESSED AS MINIMAL. I CAN'T THINK OF ANYTHING ELSE POSSIBLE TO LOWER THE GEAR. FAA CLASSIFIED THIS AS AN INCIDENT. THE BATTERY WAS SVCED JUST PRIOR TO TKOF BUT LOAD METER READINGS SHOWED GOOD AS WELL AS THE BATTERY SHOWING CHARGING. EACH GENERATOR THEREFORE WAS WORKING PROPERLY WITH THE BUS TIE CLOSED.

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.