ASN Wikibase Occurrence # 39409
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Date: | Thursday 30 January 1992 |
Time: | 13:55 |
Type: | Robinson R22 Beta |
Owner/operator: | Melbourne Helicopters Inc |
Registration: | N2313G |
MSN: | 2015 |
Year of manufacture: | 1991 |
Total airframe hrs: | 86 hours |
Fatalities: | Fatalities: 2 / Occupants: 2 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Malabar, FL -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Training |
Departure airport: | Melbourne, Florida (MLB/KMLB) |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:On January 30, 1992, about 1355 eastern standard time, N2313G, a Robinson R22 Beta operated by Melbourne Helicopters, Inc., crashed in Malabar, Florida, during an instructional flight. The flight had originated in Melbourne, Florida, approximately 20 minutes before the accident. Witnesses near the accident site stated that they heard a loud bang, looked up, and observed one rotor blade broken and part of the cabin area missing.
According to the witnesses, the helicopter then yawed left and crashed into palm trees. The main wreckage came to rest at the base of two palm trees; both occupants were killed. Witnesses on the ground reported that the engine ran until impact. The pilot held airline transport pilot and flight instructor certificates, with a helicopter rating. He had logged a total of 2,929 hours of flight time, 53 of which were in helicopters and 9 in the R 22.
The R 22 student held commercial pilot and flight instructor certificates, was rated in airplanes, and had accumulated 1,199 hours of flight time, 1 hour of which was in the R22. The closest weather station, 6 miles north, reported 7 miles visibility and winds from 230 degrees at 15 knots, gusting to 20 knots.
The main rotor mast had failed at the attachment to the top of the transmission. Both fracture surfaces exhibited bending overload in the forward left direction, as viewed from above. The examination of the main rotor blades revealed that the outboard end of the blade was bent downward about 100 degrees and that an area of heavy abrasion was 28 inches inboard from the blade tip. The forward door frame on the left side of the helicopter exhibited damage consistent with the abrasion found on the blade's leading edge. Indentations on either side of the hub were observed in positions corresponding to the tusks normally attached to the main rotor spindles.
The hub damage was consistent with the rotor blades traveling beyond their design limits in the up and down direction (flapping). The pitch change links remained attached to the upper swash plate assembly and exhibited bending overload separations at the upper rod end bearings.
The blade horn flanges exhibited scoring and compression damage consistent with the lateral impressions on the chord arm. The flight controls were examined, and control continuity was established. The Safety Board determined that the probable cause of this accident was a divergence of the main rotor from its normal plane of rotation for an undermined reason, which resulted in a main rotor blade contact with the cockpit.
Sources:
1. NTSB Identification: MIA92FA072 at
https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001211X14028 2. FAA:
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=2313G Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
25-May-2016 13:46 |
Dr.John Smith |
Updated [Time, Operator, Location, Departure airport, Source, Narrative] |
21-Dec-2016 19:23 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
08-Nov-2022 02:39 |
Ron Averes |
Updated [Location] |
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