ASN Wikibase Occurrence # 297548
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| Date: | Friday 1 March 2002 |
| Time: | 19:36 LT |
| Type: |  Cessna 421C |
| Owner/operator: | Private |
| Registration: | N421DG |
| MSN: | 421C0456 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 3898 hours |
| Engine model: | Continental GTSIO-520-L |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hailey, Idaho -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Santa Monica Airport, CA (SMO/KSMO) |
| Hailey-Sun Valley Airport, ID (SUN/KSUN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While on approach to the Friedman Memorial airport (Hailey, Idaho), the pilot of the Cessna 421C lowered the landing gear but failed to receive a gear down and locked indication on the right main gear. He attempted to lower the landing gear utilizing the nitrogen blow down system, again without success. The pilot then executed a landing with the nose and left main gear extended. Post-crash examination revealed a small amount of water in the landing gear hydraulic lines. When the landing gear system was purged and replenished with uncontaminated fluid the gear operated without malfunction both normally and with the use of the blow down system. Temperature at Hailey, Idaho, remained well below freezing before and after the accident.
Probable Cause: Water contamination within the aircraft's landing gear hydraulic line(s) which froze and blocked the line(s) preventing extension of the right main gear. A factor was the below freezing environmental conditions which the aircraft was operating in prior to and during the approach and landing.
Accident investigation:
 |
|
Sources:
NTSB SEA02LA046
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Oct-2022 19:55 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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