Tamarack President, Jacob Klinginsmith's Response to the NTSB & FAA Reversal
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Industry leaders are praising the National Transportation Safety Board (NTSB) and Federal Aviation Administration (FAA) following an announcement last week that the NTSB has reversed its previous conclusions about the cause of a 2018 Cessna CitationJet accident near Memphis, Indiana. The initial investigation originally implicated Tamarack Active Winglets as causing the accident, but the FAA and NSTB have reversed that position after evaluating new information and correcting factual errors outlined in a Petition for Reconsideration submitted by Tamarack Aerospace Group.
The Petition for Reconsideration prompted the investigation to be reopened and to be elevated from the regional level of the NTSB for further scrutiny by NTSB experts in Washington DC. It was those experts who corrected numerous errors in the initial work and reviewed new laboratory test results and ultimately concluded that the evidence did not support a conclusion that Tamarack’s technology failed during the flight or contributed to the accident in any way. The reconsideration has garnered significant support from aviation industry leadership.
“NBAA is pleased to see that the process established by the NTSB to allow for reconsideration of an accident report based on additional perspectives and information has resulted in a favorable outcome for Tamarack. No manufacturer or operator ever wants to be involved in an accident. Yet, when one does happen, it's important that all information be considered as part of the Board's final report,” said Doug Carr, Senior Vice President, Safety, Security, Sustainability & International Operations at the National Business Aviation Association (NBAA)
“NBAA is pleased to see that the process established by the NTSB to allow for reconsideration of an accident report based on additional perspectives and information has resulted in a favorable outcome for Tamarack. No manufacturer or operator ever wants to be involved in an accident. Yet, when one does happen, it's important that all information be considered as part of the Board's final report.”
Former NTSB board member John Goglia reacted with surprise to the NTSB's reversal of the original Tamarack probable cause decision saying, "after researching the accident the board was correct in reversing its original probable cause decision, Tamarack Active Winglets did not cause that accident. I’m pleased that the system worked and the NTSB considered the petition based on original and factual data supplied by the manufacturer. It is extremely rare that the NTSB reverses its probable cause decisions. I don't recall a reversal like this in recent memory. It's so important for the NTSB to take reconsiderations of probable cause seriously and then support reversals when warranted in order to maintain the credibility and integrity of the board."
In its formal response to the Petition for Reconsideration, the NTSB pointed to what was happening onboard the aircraft during the accident and clarified that:
“…the available evidence for this accident does not sufficiently show that the ATLAS was the cause of the in-flight upset from which the pilot was unable to recover,” the NTSB stated in their formal response to the Petition, which can be downloaded here.
The response also states that “…the NTSB agrees with the petitioner that the evidence is also insufficient to conclude that (1) the left actuator was in an extended position at the time of initial impact and (2) the ATLAS caused the left rolling moment; the NTSB has revised the report accordingly.”
The Petition called attention to a no-injury, no-damage malfunction on a Cessna CitationJet in the UK as being unrelated to the Indiana accident, and in their response the NTSB made adjustments to clarify the two events were unrelated, stating that “the NTSB has decided to remove the statement to ensure that our analysis does not inadvertently imply that the cause of the uncommanded left roll in the UK event was a factor in the subject accident.”
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