DAC Pitch upsets
Cited by Down3Green above:
"... testimony solved the earlier accident I mentioned ..."
Prior similar DC-4 tuck-under mishap: Eastern DC-4 30May47 day light cruise upset at 4000' near Bainbridge MD (Port Deposit); pitched down dived into ground. Capt Bill Coney, FO K.V. Willingham, 53 fatalities. Upset had been observed by by "government investigators" flying three miles behind: first it "tucked-under" then entered vertical dive. Investigators tested the DC-4 Gust Lock engagement with pitch trim use, and duplicated the upset. CAB AAR included the Gust Lock hypothesis as only one of ten possible causes. [Solberg's "Conquest" pg 324, AW 47:12 Ag 25 '47.]