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Piper PA28R pilot lost all electrical power due to alternator failure causing the right main gear to collapse on landing roll due to lack of electrical power to lock the gear in the down position.
| Attributes | |
| ACN | 533767 |
| Time | |
| Date | 200112 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : 1b1.airport |
| State Reference | NY |
| Altitude | agl single value : 0 msl single value : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach landing : roll |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 19.1 flight time total : 675.3 flight time type : 2.1 |
| ASRS Report | 533767 |
| Events | |
| Anomaly | aircraft equipment problem : critical ground encounters other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
While en route from isp to 1b1 at 4500 ft, noticed volt and battery gauge showing no charge and alternator showing no charge. I turned off all electrical load, checked circuit breakers, and recycled master. When I was on downwind I lowered the gear and felt it come down. It seemed like it locked -- I couldn't tell (no lights). I pushed the emergency extend switch twice. I rocked the wings and landed. On rollout, the right main collapsed. I raised the flaps and leaned out the mixture and killed the ignition and master. A mechanic found a field wire broken on the alternator. I would like to see if there is any way to have a mechanical indication that the gear is locked.
Original NASA ASRS Text
Title: PIPER PA28R PLT LOST ALL ELECTRICAL PWR DUE TO ALTERNATOR FAILURE CAUSING THE R MAIN GEAR TO COLLAPSE ON LNDG ROLL DUE TO LACK OF ELECTRICAL PWR TO LOCK THE GEAR IN THE DOWN POS.
Narrative: WHILE ENRTE FROM ISP TO 1B1 AT 4500 FT, NOTICED VOLT AND BATTERY GAUGE SHOWING NO CHARGE AND ALTERNATOR SHOWING NO CHARGE. I TURNED OFF ALL ELECTRICAL LOAD, CHKED CIRCUIT BREAKERS, AND RECYCLED MASTER. WHEN I WAS ON DOWNWIND I LOWERED THE GEAR AND FELT IT COME DOWN. IT SEEMED LIKE IT LOCKED -- I COULDN'T TELL (NO LIGHTS). I PUSHED THE EMER EXTEND SWITCH TWICE. I ROCKED THE WINGS AND LANDED. ON ROLLOUT, THE R MAIN COLLAPSED. I RAISED THE FLAPS AND LEANED OUT THE MIXTURE AND KILLED THE IGNITION AND MASTER. A MECH FOUND A FIELD WIRE BROKEN ON THE ALTERNATOR. I WOULD LIKE TO SEE IF THERE IS ANY WAY TO HAVE A MECHANICAL INDICATION THAT THE GEAR IS LOCKED.
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.