Accident Cessna 340 N4124Q, 17 Jan 1985
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ASN Wikibase Occurrence # 40285
 
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Date:17-JAN-1985
Time:00:57
Type:Silhouette image of generic C340 model; specific model in this crash may look slightly different    
Cessna 340
Owner/operator:private
Registration: N4124Q
MSN: 340-0088
Fatalities:Fatalities: 3 / Occupants: 3
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Johnson City, TN -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Private
Departure airport:Cincinnati, OH (LUK)
Destination airport:Columbia, SC (CAE)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
THE ACFT WAS IFR AT 17000 FT FLYING THRU WX SIGMET AREA FOR SEVERE ICING WHEN THE PLT REQUESTED A DESCENT DUE TO AIRFRAME ICE AND TURBULENCE. DURING THE DESCENT THE PLT REPORTED SHUTTING DOWN THE RIGHT ENG. ON FINAL APCH FOR AN OFF-ARPT LANDING ATTEMPT THE ACFT STALLED AND SPUN TO GROUND CONTACT. CHUNKS OF ICE WERE FOUND NEAR THE WRECKAGE. POST IMPACT EXAM OF THE RIGHT ENG REVEALED CRACKS IN THE #2, #5 AND #4 CYLINDERS. THE #4 CYLINDER HAD BURNED THRU AT THE EXHAUST PORT. THE RIGHT MAGNETO HAD UNACCEPTABLE OUTER CASE FRACTURES WHICH WERE FILLED WITH A RUBBER LIKE SEALANT. THE DISTRIBUTOR BLOCK HAD EVIDENCE OF SEVERE DESTRUCTIVE ARCING AND CROSSFIRING. NO DOCUMENTATION OF COMPLIANCE WITH BENDIX SERVICE BULLETIN NO. 612 DEALING WITH INSPECTION OF THE MAGNETOS WAS FOUND. THE RIGHT ENG PROP WAS NOT IN THE FEATHERED POSTITION. CAUSE:

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X35460


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:23 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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