ASN Wikibase Occurrence # 41776
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| Date: | Thursday 6 April 1989 |
| Time: | 16:00 |
| Type: |  Cessna 182 |
| Owner/operator: | private |
| Registration: | N5458B |
| MSN: | 33458 |
| Year of manufacture: | 1956 |
| Total airframe hrs: | 3061 hours |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Luthersville, GA -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Huntsville, AL (3M6) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT MADE LONG SLOW DESCENT & OVERFLIGHT OF AIRSTRIP TO ENSURE NO ONE WAS ON RWY. HE WAS FLYING A LOOSE RIGHT ECHELONFORMATION WITH ANOTHER ACFT. AT THE END OF THE RWY THE LEAD ACFT TURNED LEFT & CLIMBED TO ENTER DOWNWIND. THE ACCIDENT ACFT TURNED RIGHT, CLIMBED, THEN TURNED LEFT TO ENTER A LEFT DOWNWIND. AS POWER WAS APPLIED THE PLT RPTED HE HAD A PROBELM, WHICH HE DID NOT SPECIFY. THE ACFT CONTINUED IN A LEFT WING DOWN, MODERATELY STEEP DESCENT TO IMPACT WITH TREES& THE GROUND. THE ACFT CAUGHT FIRE AFTER IMPACT & BURNED. PROP DAMAGE DEMONSTRATED ENGINE WAS NOT AT HIGH POWER SETTING.THE ENGINE WAS LATER RUN IN A TEST CELL AT NEAR SPECIFICATION POWER. THE SPARK PLUGS WERE SOOTED INDICATING A RICH MIXTURE. CONDITIONS WERE SUITABLE FOR LIGHT CARB ICE WITH AVGAS. THE ACFT USED AUTOGAS WHICH ALLOWS CARB ICE SOONER & AT HIGHER TEMPS. CARB HEAT WAS IN THE COLD/OFF POSITION. CARB ICE FORMED WHICH RESTRICTED AIRFLOW & RESULTED IN OVERLY RICH MIXTURE PRECLUDING POWER INCREASE. THE PLT DID NOT EXTEND FLAPS OR SLOW AIRPLANE PRIOR TO TREE IMPACT. CAUSE: PILOT'S FAILURE TO TAKE ACTION THAT WOULD PREVENT THE FORMATION OF CARBURETOR ICE. FOLLOWING THE ENGINE MALFUNCTION, THE PILOT DID NOT CONFIGURE THE AIRPLANE SO AS TO REDUCE THE SEVERITY OF THE IMPACT, I.E. EXTEND THE FLAPS AND SLOW THE AIRPLANE. CONTRIBUTING TO THE ACCIDENT WAS THE LACK OF A REQUIREMENT BY THE FAA FOR THE AUTOGAS STC HOLDER TO PUBLISH CARBURETOR ICING PROBABILITY IMFORMATION.
Sources:
NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X28021
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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