ASN Wikibase Occurrence # 86812
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| Date: | Wednesday 20 February 2002 |
| Time: | 08:00 |
| Type: |  Cessna 172 Skyhawk |
| Owner/operator: | Private |
| Registration: | C-FISS |
| MSN: | 28779 |
| Year of manufacture: | 1956 |
| Total airframe hrs: | 3294 hours |
| Engine model: | Lycoming O-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Concrete, Washington State -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Langley, Bc, (YNJ) |
| Chilliwak, Bc, (YCW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was following the Skagit River eastbound approximately 1500-1800 feet above sea level when he observed rain showers ahead and he decided to execute a course reversal. He initiated a left turn at 75 miles per hour utilizing two "notches" (20 degrees) of flaps and noted a sink rate. He then applied full power and raised the flaps to one "notch" (10 degrees) during which the sink rate continued. The pilot reported that it "felt like the aircraft was getting sucked down." As the aircraft continued in its left turn towards the rising, tree covered hillside, the pilot executed a controlled crash into the trees and terrain. A topographic chart of the vicinity of the accident showed that the terrain gradient was considerably shallower to the south, and that the left turn initiated by the pilot placed the aircraft flying towards higher gradient terrain. The pilot reported that he had been using carburetor heat throughout the flight and that the aircraft's engine had been performing as expected.
Probable Cause: The pilot's failure to maintain adequate clearance/altitude while reversing course and turning towards rising, tree covered terrain in downdraft conditions. Contributing factors were trees, rising terrain, downdrafts and the pilot's in-flight decision to turn towards rather than away from steeper terrain during his course reversal.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20020228X00290&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Dec-2010 06:18 | slowkid | Added |
| 21-Mar-2016 16:04 | beaverspotter | Updated [Cn] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Dec-2017 15:49 | ASN Update Bot | Updated [Departure airport, Destination airport, Source, Narrative] |
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