ASN Wikibase Occurrence # 360289
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 20 June 1994 |
| Time: | 19:00 LT |
| Type: |  Schweizer 269C |
| Owner/operator: | Hillsboro Helicopters, Inc. |
| Registration: | N7506A |
| MSN: | S1280 |
| Year of manufacture: | 1987 |
| Total airframe hrs: | 664 hours |
| Engine model: | LYCOMING HIO-360-D1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hillsboro, OR -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE EXECUTING A RUN-ON LANDING THE INSTRUCTOR FELT A 'THUMP' AND THE HELICOPTER BEGAN TO OSCILLATE LATERALLY. THE INSTRUCTOR PILOT DIAGNOSED THE PROBLEM AS GROUND RESONANCE, TOOK CONTROL OF THE AIRCRAFT FROM THE STUDENT, CLOSED THE THROTTLE, LOWERED COLLECTIVE, AND THE HELICOPTER DEPARTED THE TAXIWAY. POST CRASH EXAMINATION OF THE SKID SHOCK STRUTS REVEALED THAT ALL FOUR WERE CHARGED AT A PRESSURE LOWER THAN THAT SPECIFIED. THE MAINTENANCE HANDBOOK WARNS THAT IMPROPER SHOCK STRUT PRESSURE LEVELS MAY RESULT IN GROUND RESONANCE AND DESTRUCTION OF THE HELICOPTER.
Probable Cause: THE IMPROPER SERVICING OF THE SKID SHOCK STRUTS.
Accident investigation:
 |
|
Sources:
NTSB SEA94LA153
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 20:06 | 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