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ASN Wikibase Occurrence # 41124
Last updated: 2 June 2020
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Type:Eichman AEROBAT III
Registration: N17638
C/n / msn: 1003
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Brownsville, TX -   United States of America
Phase: Take off
Departure airport:(BRO)
Destination airport:
Investigating agency: NTSB
The pilot/builder/designer was attempting to fly the airplane on its maiden test flight. During the takeoff roll, the pilot lifted the airplane's nose wheel off the runway two or three times, then the airplane lifted off the runway and climbed to an altitude approximately one half of the airplane's wingspan. The airplane immediately returned to the runway in a porpoise like motion and lifted off a second time with a hard right roll. The airplane then impacted the runway in an inverted position. Postaccident examination revealed the rudder exhibited crushed areas at the bottom and top. The top crushed area matched dimensionally to the four-belt driven wheel which turned the airplane's propeller. A test pilot reported that during previous high speed taxi runs, conducted in August 1987, he had to apply 'stop-to-stop' elevator stick movements to maintain a steady pitch attitude. A review of the video tape of the taxi tests revealed that the elevator was moving in what appeared to be 'stop-to-stop' movements. The same elevator movements were observed in a video tape of the accident airplane during the attempted takeoff. The test pilot said he believed the airplane 'had some kind of pitch oscillation problem.' CAUSE: inadequate design by the pilot/builder/designer. Related factors were: the porpoise that was encountered by the pilot during the takeoff, and the subsequent jammed rudder.



Revision history:

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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