ASN Wikibase Occurrence # 356263
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: | Wednesday 5 February 1997 |
| Time: | 22:16 LT |
| Type: |  Cessna 421C |
| Owner/operator: | Brady Industries, Inc. |
| Registration: | N45MV |
| MSN: | 0465 |
| Total airframe hrs: | 2918 hours |
| Engine model: | Continental GTSIO-520-L |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cedar City, UT -
 United States of America
|
| Phase: | Approach |
| Nature: | Executive |
| Departure airport: | Las Vegas, NV (KLAS) |
| (KCDC) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was on a night instrument approach in instrument meteorological conditions (IMC). When he put the gear handle down, the nose gear extended, but neither of the mains indicated down-and-locked. He recycled the gear a number of times, but still did not get a down indication of the main gear. The pilot then used the emergency blow-down gear extension system, but only the nose gear & left main indicated down. Since the gear could not be retracted once the blow-down system was used, & since severe weather was present, the pilot elected to continue the approach & land with the right main gear not fully extended. As the aircraft slowed during the landing roll, the right wing contacted the runway, & the aircraft began to slide sideways. While the aircraft was sliding, the nose gear and left main gear collapsed, and the right gear, which had come partially out of the wheel well, was torn from the wing. Postaccident inspection of the landing gear extension & retraction system revealed that hydraulic fluid in the right main gear actuator contained 30% water by volume. The surface temperature near the time of the landing was 23 degrees Fahrenheit, & the aircraft had been at altitude for over an hour before the approach. There was evidence that while en route, water in the actuator had frozen, & ice had kept the actuator from functioning properly when the pilot attempted to extend the gear. How or when the hydraulic system of the 19 year old aircraft had been contaminated was not determined.
Probable Cause: water contamination in the hydraulic system, which froze in the (right) main gear hydraulic actuator, and restricted movement of the (right) main gear retraction and extension system.
Accident investigation:
 |
|
Sources:
NTSB SEA97LA058
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 20:45 | 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