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GA small aircraft lost alternator 60 south of iiu en route to pdk. Pilot cut electrical load and through coordination with ARTCC was able to continue to destination with sufficient electrical power to make a normal approach and landing at pdk.
| Attributes | |
| ACN | 192648 |
| Time | |
| Date | 199110 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : iiu |
| State Reference | KY |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute airway : v51 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 40 flight time total : 2000 flight time type : 1500 |
| ASRS Report | 192648 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On IFR flight on 10/fri/91 from gyy to pdk, I lost the alternator about 60 NM south of louisville on V51. I saw the ammeter indicator move to the 'discharge' side, so I felt confident I had a full battery charge. I advised ATC of the problem and got permission to leave the frequency and to turn off the transponder. I turned off all the avionics and other uses of battery power, tried all circuit breakers, etc, but could not restore alternator charging. I then turned on 1 radio and the DME, contacted ATC and obtained permission to go off the air again. This was repeated 2 or 3 times to give position reports, and I arrived at pdk with ample battery reserve for communications navigation, lowering the gear and flaps. The problem turned out to be a malfunctioning voltage regulator, which was replaced at pdk.
Original NASA ASRS Text
Title: GA SMA LOST ALTERNATOR 60 S OF IIU ENRTE TO PDK. PLT CUT ELECTRICAL LOAD AND THROUGH COORD WITH ARTCC WAS ABLE TO CONTINUE TO DEST WITH SUFFICIENT ELECTRICAL PWR TO MAKE A NORMAL APCH AND LNDG AT PDK.
Narrative: ON IFR FLT ON 10/FRI/91 FROM GYY TO PDK, I LOST THE ALTERNATOR ABOUT 60 NM S OF LOUISVILLE ON V51. I SAW THE AMMETER INDICATOR MOVE TO THE 'DISCHARGE' SIDE, SO I FELT CONFIDENT I HAD A FULL BATTERY CHARGE. I ADVISED ATC OF THE PROBLEM AND GOT PERMISSION TO LEAVE THE FREQ AND TO TURN OFF THE TRANSPONDER. I TURNED OFF ALL THE AVIONICS AND OTHER USES OF BATTERY PWR, TRIED ALL CIRCUIT BREAKERS, ETC, BUT COULD NOT RESTORE ALTERNATOR CHARGING. I THEN TURNED ON 1 RADIO AND THE DME, CONTACTED ATC AND OBTAINED PERMISSION TO GO OFF THE AIR AGAIN. THIS WAS REPEATED 2 OR 3 TIMES TO GIVE POS RPTS, AND I ARRIVED AT PDK WITH AMPLE BATTERY RESERVE FOR COMS NAV, LOWERING THE GEAR AND FLAPS. THE PROBLEM TURNED OUT TO BE A MALFUNCTIONING VOLTAGE REGULATOR, WHICH WAS REPLACED AT PDK.
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.