ASN Wikibase Occurrence # 133826
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Date: | Saturday 1 June 1996 |
Time: | 21:00 LT |
Type: | Brantly B-2B |
Owner/operator: | Rick Dobbelaere |
Registration: | N2261U |
MSN: | 423 |
Total airframe hrs: | 640 hours |
Engine model: | Lycoming VIO-360-A1A |
Fatalities: | Fatalities: 0 / Occupants: 2 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Oakwood, OH -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Private |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The pilot reported that while he maneuvered during the approach to land, the helicopter experienced a total loss of engine power. When the power loss occurred, he '...nosed down and put the collective down...' to enter autorotation. He '...picked a spot [for landing] ... looked at the rotor RPM (RRPM), it was 320... [and] at 60 to 80 feet I pulled collective...' to begin deceleration. The helicopter struck the ground with a forward speed of 30 MPH with the tail skid striking the ground prior to the main gear. According to the pilot, the normal operating range for RRPM is 400-472 and that 400 RRPM was minimum for autorotation. The pilot did not possess a helicopter rating, but had received 5 to 6 hours of instruction in helicopters. He reported that he had flown 28 hours within the preceding six months, including 3 hours in the accident aircraft. Postaccident examination revealed that the fuel tank vent tube assembly was clogged with '...insect and nest remains... .' The most recent documented 100-hour maintenance inspection of the helicopter occurred on 5/18/70.
Probable Cause: a loss of engine power due to inadequate maintenance and inspection by the owner/operator which failed to detect the clogged fuel vent line, and the pilot's improper autorotation. A related factor was the pilot's inadequate training/familiarization with helicopter emergency procedures.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | IAD96LA088 |
Status: | Investigation completed |
Duration: | 4 months |
Download report: | Final report |
|
Sources:
NTSB IAD96LA088
Location
Revision history:
Date/time | Contributor | Updates |
21-Dec-2016 19:26 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
09-Apr-2024 06:39 |
ASN Update Bot |
Updated [Time, Other fatalities, Phase, Source, Narrative, Category, Accident report] |
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