An aviation researcher, writer, aviation participant, pilot & agricultural researcher. Author of over 35 scientific publications world wide.


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Do other #aviation Investigators direct the regulator?

Do other #aviation Investigators direct the regulator? is a reasonable question.

This is particularly after the REX loss of propeller incident last week and the #Mildura incident – almost four years ago [when two 737 aircraft ended up at Mildura due to incorrect data being fed to the weather provider and the lack of information from #airservices].

Answer is: NO

Other images from propeller recovery

Of course, there is the #pelair and Lockhart River accidents, which did not go to specific SR’s by #atsb.

I found a specific report by #NTSB in 1991 which is relevant, where the #FAA is named in the causal links of the accident.

NTSB admonishes the FAA:

…. The National Transportation Safety Board determines that the probable cause of this accident was the loss of control in flight as a result of a malfunction of the left engine propeller control unit which allowed the propeller blade angles to go below the flight idle position. Contributing to the accident was the deficient design of the propeller control unit by Hamilton Standard and the approval of the design by the Federal Aviation Administration.

The design did not correctly evaluate the failure mode that occurred during this flight, which resulted in an uncommanded and uncorrectable movement of the blades of the airplane’s left propeller below the flight idle position……

From: Embraer loss of control in 1991


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