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ASN Wikibase Occurrence # 37764
Last updated: 25 April 2019
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Date:04-JUL-1991
Time:09:00
Type:Silhouette image of generic RV4 model; specific model in this crash may look slightly different
Van's RV-4
Owner/operator:private
Registration: N44AZ
C/n / msn: 1
Fatalities:Fatalities: 1 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Yellowstonepark, WY -   United States of America
Phase: Approach
Nature:Private
Departure airport:Westyellowstone, WY (WYS)
Destination airport:Casper, WY (CPR)
Investigating agency: NTSB
Narrative:
THE PILOT OF THE RV-4 EXPERIMENTAL AIRCRAFT EXPERIENCED A PARTIAL POWER LOSS, AND RECEIVED FATAL INJURIES WHEN THE AIRCRAFT IMPACTED THE WATER, DURING AN ATTEMPTED EMERGENCY LANDING, NEAR THE SHORELINE OF A LAKE. LATER INSPECTION OF THE ENGINE FOUND THAT THE SCAT TUBING WHICH RAN FROM THE AIR INTAKE FILTER TO THE FUEL INJECTOR BODY, WAS ROUTED IN A MANNER THAT CAUSED THE INTERNAL WIRE SUPPORT TO BE DISPLACED, ALLOWING THE TUBING WALLS TO COLLAPSE. THIS CONDITION REDUCED THE INDUCTION AIRFLOW TO THE ENGINE. CAUSE: A COLLAPSED INDUCTION AIR DUCT. FACTORS INCLUDE INADEQUATE DESIGN BY THE MANUFACTURER/BUILDER, AND A MISJUDGED RATE OF DESCENT BY THE PILOT.

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X17699


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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