ASN Wikibase Occurrence # 359904
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| Date: | Friday 26 August 1994 |
| Time: | 18:45 LT |
| Type: | Bell 47 MARK-6 |
| Owner/operator: | Northland Helicopter Inc |
| Registration: | N19JM |
| MSN: | 1921 |
| Total airframe hrs: | 5852 hours |
| Engine model: | LYCOMING V0-435-A1F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lake City, MN -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE PERFORMING A LOW LEVEL AGRICULTURAL APPLICATION TURN, THE PILOT REPORTED COMPLETING HIS TURN AND HAVING A LOWER THAN NORMAL ROTOR RPM. THE TEMPERATURE WAS APPROXIMATELY 74 DEGREES FAHRENHEIT AND THE HUMIDITY WAS REPORTED BY THE PILOT AS HIGH. DENSITY ALTITUDE WAS APPROXIMATELY 2000 FEET. ATTEMPTING TO REGAIN RPM AND LEVEL OFF WAS NOT SUCCESSFUL, AND THE HELICOPTER SPRAY BOOMS CONTACTED THE CORN CROP. THE HELICOPTER STOPPED AND OVERTURNED.
Probable Cause: THE LOSS OF LIFT RESULTING FROM THE PILOT'S FAILURE TO MAINTAIN ROTOR RPM DURING AN AERIAL APPLICATION TURN. THE POWER AVAILABLE FROM THE ENGINE WAS LESS THAN THAT REQUIRED TO REGAIN THE LOST ROTOR RPM.
Accident investigation:
 |
|
Sources:
NTSB CHI94LA300
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 15:48 | ASN Update Bot | Added |
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