ASN Wikibase Occurrence # 32288
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: | Monday 13 February 1995 |
| Time: | 11:20 LT |
| Type: |  Sikorsky S-58JT |
| Owner/operator: | Glacier Helicopters |
| Registration: | N1099T |
| MSN: | 58-1646 |
| Total airframe hrs: | 9776 hours |
| Engine model: | P&W PT6-T3 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Marblemount, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE MAIN ROTOR DRIVESHAFT FAILED DUE TO FATIGUE FAILURE WHILE THE PILOT WAS CONDUCTING HELICOPTER LOGGING OPERATIONS. THE MAIN ROTOR DRIVESHAFT HAD 952 HOURS SINCE NEW, AND HAD BEEN INSTALLED NEW AT THE MOST RECENT GEARBOX OVERHAUL. OVERHAUL PERIOD AND MAIN ROTOR DRIVESHAFT RETIREMENT TIME ARE 2500 HOURS. THE PILOT WAS NOT AT AN ALTITUDE OR AIRSPEED WHERE A SUCCESSFUL AUTOROTATION COULD BE ACCOMPLISHED.
Probable Cause: FATIGUE FAILURE OF THE MAIN ROTOR DRIVESHAFT.
Accident investigation:
 |
|
Sources:
NTSB SEA95LA051
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 20-Jul-2010 10:11 | TB | Updated [Time, Aircraft type, Cn, Operator, Total fatalities, Other fatalities, Location, Country, Phase, Nature, Source, Damage, Narrative] |
| 31-Oct-2018 15:17 | Aerossurance | Updated [Time, Total fatalities, Other fatalities, Source, Narrative] |
| 09-Apr-2024 16:36 | ASN Update Bot | Updated [Time, Total occupants, Other fatalities, Nature, Source, Damage, Narrative, Category, Accident report] |
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