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ASN Wikibase Occurrence # 42946
Last updated: 7 February 2020
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Date:25-JUL-1990
Time:14:00
Type:Lake LA-4-200 Buccaneer
Owner/operator:private
Registration: N8011M
C/n / msn: 1061
Fatalities:Fatalities: 1 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Gt. Barrington , MA -   United States of America
Phase: Take off
Nature:Private
Departure airport:
Destination airport:Lake Garfield, MA
Investigating agency: NTSB
Narrative:
AFTER TAKEOFF THE AIRPLANE CLIMBED TO ABOUT 50 FEET AGL AND THE PLT ATTEMPTED TO ACCELERATE TWICE BY LOWERING THE NOSE, LOSING ALTITUDE EACH TIME. THE AIRPLANE THEN BANKED RIGHT BEFORE FLYING INTO TREES ABOUT 1,500 FEET FROM THE END OF THE RUNWAY. IMPACT OCCURRED IN A RESIDENTIAL BACKYARD. THE PASSENGER ESCAPED BUT WAS UNABLE TO RESCUE THE PILOT BEFORE FIRE CONSUMED THE CABIN. AN ENGINE RUN WAS SUCCESSFUL BUT FAILED TO ATTAIN AIR FLOW AND RPM TEST POINTS. DISASSEMBLY REVEALED CORROSION THROUGHOUT INDICATING THAT THE ENGINE HAD BEEN INACTIVE FOR EXTENDED PERIODS OF TIME. THERE WAS ALSO EVIDENCE OF MULTIPLE WORN COMPONENTS AND METAL CONTAMINATION. COMPRESSION ON CYLINDERS 1-4 WAS 65/80, 75/80, AND 69/80 RESPECTIVELY. LEFT MAGNETO TIMING WAS 24.5 DEGREES BTC VICE THE CORRECT TIMING OF 20 DEGREES BTC. AN ANNUAL INSPECTION WAS PERFORMED ON 4/5/90. THE ENGINE WAS NOT CAPABLE OF PRODUCING RATED POWER DUE TO MECHANICAL INEFFICIENCY AND WEAR LIMITS BEING EXCEEDED. CAUSE: THE PILOT IN COMMAND'S FAILURE TO PROPERLY MAINTAIN THE ENGINE, THE INADEQUATE ANNUAL MAINTENANCE INSPECTION, LOW COMPRESSION, AND IMPROPER MAGNETO TIMING. A FACTOR WAS THE RESULTANT DETERIORATED CLIMB PERFORMANCE.

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X23780


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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