ARDU was looking at an issue on that aircraft, had you guys had an anomaly on the prior flights?
FDR, the B model had been on a low-level search for a missing Macchi on Barrington Tops. heading for home, the pilot climbed to 1500' agl and levelled off. The machine suddenly bunted over and pointed 90 degrees down. The pilot managed to get the bird back to level without hitting the ground but didn't see what the airspeed got to. Put it on the ground, left it overnight. The Chinook came to collect it next morning, and there was a bent pitot tube on the nose, with a satisfied-looking cow standing next to it, big smile on its face.
The Huey was given a full D Servicing to try to find what happened, no fault found. I took it up to do a Post-D test, followed the checklist, it was the smoothest B in the fleet. I suggested that a REAL test pilot be found to run some tests. A test pilot, passing through Willy at the time, on the way to do a course in Canberra, was given the job, and he was the poor fella in the left seat next day.
Subsequent thoughts were that the original bunting problem was caused by the horizontal stabiliser stalling - no more downforce, so over she went.