ASN Wikibase Occurrence # 381236
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: | Thursday 4 August 1983 |
| Time: | 19:45 LT |
| Type: |  Bell 206B |
| Owner/operator: | Sundance Helicopter Svc., Inc. |
| Registration: | N51DC |
| MSN: | 2732 |
| Total airframe hrs: | 6329 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Stuart, FL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE IN CRUISE FLT AT APRX 600 FT AGL, A CATASTROPHIC FAILURE OF THE ENGINE'S 3RD STAGE TURBINE OCCURRED. THE PLT RELATED THAT HE OBSERVED AN ENGINE CHIP DETECTOR LIGHT, WHICH WAS FOLLOWED ALMOST IMMEDIATELY BY FIRE IN THE ENGINE. HE MADE A SUCCESSFUL AUTOROTATIVE LANDING. THE FIRE WAS EXTINGUISHED BY USE OF HAND FIRE FIGHTING EQUIPMENT. FIRE DAMAGE WAS LIMITED TO THE ENGINE AREA. THE ENGINE WAS SHIPPED TO THE MANUFACTURER'S FACILITY FOR EXAMINATION. ACCORDING TO THEIR REPORT, THE FAILURE OCCURRED DUE TO WHAT APPEARED TO BE AN OIL TYPE CORROSION FROM THE I.D. SURFACE OF THE INNER POWER TURBINE SHAFT; CORROSION WEAKENED THE SHAFT BY REDUCING THE WALL THICKNESS WHICH RESULTED IN IT FRACTURING & ALLOWING THE 3RD STAGE TURBINE WHEEL TO SEPARATE FROM THE 4TH STAGE TURBINE SHEEL & OVERSPEED; THE 3RD STAGE WHEEL THEN EXPERIENCED AN UNCONTAINED BURST FAILURE AS A RESULT OF THE OVERSPEED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB MIA83LA199
History of this aircraft
Other occurrences involving this aircraft
| 27 January 1984 | N51DC | Sundance Helicopter | 1 | Stuart, FL | |
w/o |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 01:18 | 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