ASN Wikibase Occurrence # 380083
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| Date: | Sunday 12 February 1984 |
| Time: | 13:30 LT |
| Type: |  Brantly Helicopter B-2B |
| Owner/operator: | Edward Younkin |
| Registration: | N2273U |
| MSN: | 43A |
| Total airframe hrs: | 742 hours |
| Engine model: | Lycoming IVO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mt. Pleasant, PA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Connellsville, PA (2G3 |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT FLEW TO GREENSBURG, WHERE HE BROUGHT THE HELICOPTER TO A 2 FT HOVER AND DEPARTED WITH A MAX PERFORMANCE CLIMB. HE STATED THE HELICOPTER BEGAN TO EXHIBIT CONTROL IRREGULARITIES WHICH HE DESCRIBED AS 'A DUTCH ROLL WOBBLE TYPE OF SHUFFLE.' HE CONTINUED THE FLT & SAID THE 'SHUFFLE' SUBSIDED AS PWR WAS REDUCED DURING APCH TO MT PLEASANT. HOWEVER, HE EXPERIENCED DIRECTIONAL CONTROL PROBLEMS DURING THE APCH WHICH WERE PROPORTIONAL TO CHANGES IN COLLECTIVE & THROTTLE APPLICATIONS. INITIALLY, HE THOUGHT THE PROBLEM WAS ASSOCIATED WITH THE WIND. THE PLT INCREASED THROTTLE, COLLECTIVE, RTPEDAL & BEGAN A CLIMB. THEN AS A PRECAUTION, HE CUT THE THROTTLE TO STOP AN INCREASING VIBRATION & KEEP THE ENG FROM OVERREVVING. COLLECTIVE WAS REDUCED TO MAINTAIN ROTOR RPM, THEN WAS INCREASED ON DESCENT THRU 20 FT AGL, BUT THE ACFT LANDED HARD, COLLAPSING A SKID. ACCORDING TO WITNESSES, IT HAD INSUFFICIENT PWR & MADE A 360 DEG ROTATION BEFORE IMPACT.TWO MAIN ROTOR BLADES SEPARATED AND WERE FOUND WITHIN PROXIMITY OF THE HELICOPTER WITH IMPACT DAMAGE.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC84LA070
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Apr-2024 12:39 | ASN Update Bot | Added |
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