ASN Wikibase Occurrence # 381208
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 6 August 1983 |
| Time: | 16:30 LT |
| Type: |  Bell 47D1 |
| Owner/operator: | Sunbelt Flyers, Inc. |
| Registration: | N68632 |
| MSN: | WH 5003 |
| Total airframe hrs: | 2482 hours |
| Engine model: | Lycoming VO-435-A1F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Moultrie, GA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Moultrie, GA (KMUL) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AFTER COMPLETING A SWATH RUN, THE PLT PULLED UP, MADE A TURN, THEN STARTED A LET DOWN FOR ANOTHER PASS. AS HE INCREASED POWER, THE ENG RPM WENT FROM 3000 TO 3100. AT THE SAME TIME, THE PLT HEARD A WHINING NOISE AND NOTED THAT THE ROTOR RPM WAS DECREASING. THE PLT WAS UNABLE TO STOP THE DESCENT BEFORE THE HELICOPTER STRUCK THE GROUND. AFTER IMPACTING THE GROUND, THE HELICOPTER BOUNCED, THEN ROLLED OVER. AN EXAM OF THE CENTRIFUGAL CLUTCH ASSEMBLY, PN 47-620-609-1, REVEALED IT HAD AN ESTIMATED 60% CONTACT BETWEEN THE SHOE LININGS AND THE DRUM FACE. A MINIMUM OF 85% CONTACT WAS REQUIRED. THE CLUTCH DID NOT CONFORM TO THE TOE-IN REQUIREMENTS AND NONE OF THE HEELS OF THE CLUTCH SHOES WERE MAKING CONTACT WITH THE DRUM, THE HELICOPTER HAD FLOWN 220 HRS SINCE THE LAST ANNUAL INSPECTION WHEN THE CLUTCH SHOES WERE DEGLAZED 8 THE CLUTCH DRUM WAS CHECKED, AND IT HAD FLOWN APPRX 13 HRS SINCE THE LAST 100 HR INSPECTION.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ATL83LA315
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 00:59 | 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