ASN Wikibase Occurrence # 44514
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Date: | Saturday 30 April 2005 |
Time: | 20:11 |
Type: | Cessna 170B |
Owner/operator: | Private |
Registration: | N6352Y |
MSN: | 25326 |
Total airframe hrs: | 5371 hours |
Engine model: | Continental C 145-2 |
Fatalities: | Fatalities: 1 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Portland, OR -
United States of America
|
Phase: | En route |
Nature: | Private |
Departure airport: | Pullman, WA (PUW) |
Destination airport: | Vancouver, WA (VUO) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The airplane was returning to its home airport when the pilot became incapacitated by carbon monoxide fumes from the airplanes engine muffler heat exchanger [the heat control knob was found "On"]. During the last 15 minutes of flight, the radar data shows the airplane flying several meandering 360 degree turns before impacting terrain. Postimpact examination of the engine's muffler revealed a crack around the entire circumference just aft of it's forward flange. The airplane's last annual inspection was completed on February 1, 2005. The FAA, in Federal Aviation Regulation, Part 43: Maintenance, Preventive maintenance, Rebuilding, and Alteration, Appendix D, provides guidelines for an airplane's annual inspection. Section (d) (8) Exhaust stacks--for cracks, defects, and improper attachment. The airplane's manufacturer also provides a checklist for an annual inspection in the aircraft's Service Manual. In the section for the Engine Compartment, #12. Exhaust system for security, leaks, cracks, and burned-out spots. Refer to Paragraph 12-74 [Inspection of the exhaust system].
Probable Cause: The pilot's inability to control the airplane due to his incapacitation (carbon monoxide poisoning) from a deteriorated engine exhaust muffler. A contributing factor was the inadequate annual inspection by other maintenance personnel.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | SEA05FA090 |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
NTSB:
https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20050504X00552&key=1 Location
Revision history:
Date/time | Contributor | Updates |
28-Oct-2008 00:45 |
ASN archive |
Added |
21-Dec-2016 19:24 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
06-Dec-2017 08:08 |
ASN Update Bot |
Updated [Source, Narrative] |
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