ASN Wikibase Occurrence # 383563
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| Date: | Tuesday 17 August 1982 |
| Time: | 10:05 LT |
| Type: |  Enstrom F-28F |
| Owner/operator: | Kean & Associates |
| Registration: | N5698E |
| MSN: | 506 |
| Total airframe hrs: | 770 hours |
| Engine model: | Lycoming HIO-360-F1AD |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Near Sutton, AK -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Executive |
| Departure airport: | Near Sutton, AK |
| Near Sutton, AK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT HAD APPROACHED AND LANDED ON A BLUFF TO DISCHARGE HIS TWO PASSENGERS. HOWEVER, BEFORE DISCHARGING THE PASSENGERS, HE DECIDED TO TAKEOFF AND FIND A BETTER LANDING AREA. WHEN THE HELICOPTER WAS ABOUT 10 TO 20 FT FROM THE TAKEOFF POINT, BUT APPROXIMATELY 200 FT AGL, THERE WAS A DECREASE IN RPM. INITIALLY, THE PILOT THOUGHT HE WAS SETTLING WITH POWER. HE LOWERED THE NOSE AND COLLECTIVE, BUT WAS UNABLE TO REGAIN THE RPM, BUT HE FELT THE HELICOPTER YAW TO THE LEFT. HE FELT MAST-BUMPING AND REALIZED HE MUST BE CROSS-CONTROLLING WITH TOO MUCH RIGHT PEDAL AND LEFT CYCLIC. HE THEN ENTERED AN AUTOROTATION. THE HELICOPTER COLLIDED WITH TREES ON THE SIDE OF THE BLUFF AND ROLLED TO THE BOTTOM OF THE HILL. AN EXAMINATION REVEALED THAT THE NO-2 CYLINDER COMPRESSION WAS LOW. THE NO-2 INTAKE VALVE HAD BECOME TULIPED AND WAS LEAKING. THERE WAS EVIDENCE THAT IT HAD BEEN POUNDING. ALSO, THERE WAS INDICATIONS OF HIGH ENGINE RPM AND TEMPERATURE. THE HELICOPTER HAD BEEN FLOWN 38 HRS SINCE THE LAST INSPECTION.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ANC82DA075
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Apr-2024 01:57 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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