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ASN Wikibase Occurrence # 217270
Last updated: 27 August 2019
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Date:18-JAN-1992
Time:13:45
Type:Silhouette image of generic BE35 model; specific model in this crash may look slightly different
Beechcraft 35
Owner/operator:private
Registration: N3342V
C/n / msn: D-805
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Nucla, CO -   United States of America
Phase: En route
Nature:Private
Departure airport:Nucla, CO (6V6)
Destination airport:Englewood, CO (APA)
Investigating agency: NTSB
Narrative:
FLUTTER OF THE EMPENNAGE OCCURRED DURING A CRUISE-DESCENT IN SMOOTH AIR. THIS RESULTED IN CRACKS IN ALL 4 CORNERS OF THE AFT FUSELAGE BULKHEAD AND WRINKLING OF THE FUSELAGE SKIN IN THE AREA OF THE RUDDERVATOR ATTACHMENT POINTS. THE LEFT RUDDERVATOR HAD BEEN INSTALLED ON THE AIRPLANE DURING AN ANNUAL INSPECTION SEVERAL WEEKS BEFORE THE ACCIDENT, AFTER IT WAS REMOVED TO HAVE NEW SKIN INSTALLED. THE SURFACE WAS REPAINTED, AND THE PAINT THICKNESS EXCEEDED THE MANUFACTURER'S FACTORY ACCEPTANCE CRITERIA. POST-ACCIDENT TESTING DISCLOSED THE STATIC BALANCE OF BOTH RUDDERVATORS TO BE EXCESSIVELY TAIL HEAVY. NO LEAD BALANCING WASHERS WERE FOUND IN EITHER RUDDERVATOR COUNTERWEIGHT HOUSING.

Probable Cause: IMPROPER STATIC BALANCE OF THE RUDDERVATORS FOLLOWING REBUILDING/REPAINTING, WHICH RESULTED IN EMPENNAGE FLUTTER.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001211X13977&key=1

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration:
Download report: Final report


Revision history:

Date/timeContributorUpdates
04-Nov-2018 12:47 ASN Update Bot Added

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