ASN Wikibase Occurrence # 361465
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| Date: | Wednesday 18 August 1993 |
| Time: | 10:00 LT |
| Type: |  Enstrom F-28C |
| Owner/operator: | Puget Sound Helicopters |
| Registration: | N86198 |
| MSN: | 521-2 |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 3144 hours |
| Engine model: | LYCOMING HIO-360-E1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Seattle, WA -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | |
| Bellevue, WA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE EN ROUTE AT ABOUT 800 FEET AGL, THE HELICOPTER EXPERIENCED A COMPLETE LOSS OF POWER. THE PILOT MADE AN AUTOROTATION TO A CONFINED GRASSY AREA, BUT JUST PRIOR TO TOUCHDOWN HAD TO MANEUVER TO AVOID A PERSON IN THE AREA OF DESIRED LANDING. THE AIRCRAFT TOUCHED DOWN, BOUNCED, AND THEN EXPERIENCED A SKID COLLAPSE WHEN IT TOUCHED DOWN A SECOND TIME. AN INSPECTION OF ENGINE COMPONENTS SHOWED THAT ONE MAGNETO CONDENSER WAS SHORTING-OUT BY ARCING OVER ITS INSULATOR BASE, AND THE SECOND CONDENSER WAS SHORTING-OUT WHERE THE LEAD WIRE WAS EXPOSED THROUGH ITS INSULATION.
Probable Cause: SHORTED MAGNETO CONDENSERS. FACTORS INCLUDE A HIDDEN OBSTRUCTION IN THE LANDING AREA, AND A REDUCTION IN ROTOR RPM FROM ATTEMPTING TO AVOID THE OBSTRUCTION.
Accident investigation:
 |
|
Sources:
NTSB SEA93FA178
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 18:43 | ASN Update Bot | Added |
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