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ASN Wikibase Occurrence # 42939
Last updated: 16 December 2019
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Date:12-APR-1989
Time:10:45
Type:Silhouette image of generic LA4 model; specific model in this crash may look slightly different
Lake LA-4-200 Buccaneer-EP
Owner/operator:Lake Aircraft
Registration: N8521Z
C/n / msn: 1093
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Bellevue, WA -   United States of America
Phase: En route
Nature:Training
Departure airport:Renton, WA (RNT)
Destination airport:
Investigating agency: NTSB
Narrative:
THE INSTRUCTOR PLT (CFI) HAD BEEN TRAINING THE STUDENT, WHO WAS A CERTIFICATED PLT, BUT NOT SEAPLANE RATED. WITNESSES RPRTD THAT AS THE ACFT DEPARTED LAKE SAMMAMISH, THE ENG MADE UNUSUAL SOUNDS, THEN IT BECAME SILENT. ONE WITNESS RPRTD HESAW THE AIRPLANE SPINNING IN A FLAT ATTITUDE. AN INVESTIGATION REVEALED NO PREIMPACT PART FAILURE, BUT DURING A TEST, THE SPARK PLUGS WOULD NOT FIRE CONTINUOUSLY AT THE MIMIMUM ALLOWABLE OPERATIONAL PRESSURE. THE ACFT HAD BEEN EQUIPPED WITH AN EXTENDED PROPELLER HUB IN ACCORDANCE WITH STC #SA4NE. THIS MODIFICATION EXTENDED THE PROPELLER REARWARD BY 4 INCHES. THE ACFT HAD FLOWN 255 HRS SINCE IT WAS LAST INSPECTED. CAUSE: LOSS OF ENGINE POWER FOR AN UNDETERMINED REASON AND FAILURE OF THE INSTRUCTOR PILOT (CFI) TO MAINTAIN CONTROL OF THE AIRCRAFT, WHICH RESULTED IN A STALL/SPIN.

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X28199


Revision history:

Date/timeContributorUpdates
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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