ASN Wikibase Occurrence # 30275
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: | Friday 30 August 2002 |
| Time: | 10:06 |
| Type: | Sikorsky S-55T |
| Owner/operator: | Central Sierra Helicopters |
| Registration: | N747A |
| MSN: | 55-910 |
| Total airframe hrs: | 12689 hours |
| Engine model: | Garrett-AiResearch TSE 331-3LL |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lytle Creek, California -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Fire fighting |
| Departure airport: | Lytle Creek, CA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter collided with terrain while attempting a precautionary landing due to a hydraulics system failure. The helicopter was engaged in firefighting water drops. While returning to pickup additional fuel, and make bucket repairs, the red hydraulic failure light illuminated and the flight controls became stiff. About 10 feet above the ground, the cyclic flight control moved "hard over," which resulted in the nose moving up and to the right until the main rotor blades contacted the ground. The helicopter came to rest on its right side. Post crash examination by a laboratory revealed contamination of the hydraulic fluid by water and microbial growth.
Probable Cause: Failure of the hydraulic system due to contamination in the hydraulic fluid, which resulted in an in-flight loss of control.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20020905X01529&key=1
Location
Media:
Wreckage of S-55T N747A at Mesa - Falcon Field (MSC/FFZ) Arizona, USA, on February 14, 2004:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 19-Jul-2010 08:35 | TB | Updated [Date, Time, Registration, Cn, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Damage, Narrative] |
| 09-Jan-2011 01:54 | Anon. | Updated [Operator, Source, Narrative] |
| 27-Sep-2013 16:21 | Dr. John Smith | Updated [Location, Source, Embed code, Narrative] |
| 27-Sep-2013 16:21 | Dr. John Smith | Updated [Narrative] |
| 09-Dec-2017 17:15 | ASN Update Bot | Updated [Time, Operator, Nature, Departure airport, Source, Embed code, Damage, Narrative] |
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