ASN Wikibase Occurrence # 384391
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Saturday 15 May 1982 |
| Time: | 16:15 LT |
| Type: |  Bell 47G-2 |
| Owner/operator: | Island Helicopter, Inc. |
| Registration: | N911X |
| MSN: | 2511 |
| Year of manufacture: | 1959 |
| Total airframe hrs: | 2642 hours |
| Engine model: | Lycoming VIO-435-A1E |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Brookville, NY -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Garden City, NY (4N6) |
| Garden City, NY (4N6) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE RETURNING TO THE HELIPORT, THE PILOT NOTICED A DECAY IN THE ENGINE AND ROTOR RPM'S. HE ELECTED TO MAKE A PRECAUTIONARY LANDING IN A PLOWED FIELD. DURING LANDING, THE MANIFOLD PRESSURE WENT TO THE RED LINE WHILE THE RPM DECAYED. THE HELICOPTER TOUCHED DOWN SOFTLY, BUT WITH ABOUT 10 MPH FORWARD SPEED. IT ROLLED FORWARD AND TO THE RIGHT WHEN THE SKIDS DUG INTO THE SOFT GROUND. AN INVESTIGATION REVEALED THAT THE NO. 6 CYLINDER HAD A LOW COMPRESSION READINGOF 5/80 WITH BLOW-BY EVIDENT INTO THE INTAKE SYSTEM. WHEN THE CYLINDER WAS REMOVED, THE INTAKE VALVE WAS FOUND NOT TO BE SEATING PROPERLY. NO OTHER MALFUNCTION OR DEFECT OF THE ENGINE OR ENGINE CONTROLS WAS NOTED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC82DA097
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Apr-2024 10:42 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation