Hello,
The airman concerned is AUS400500 F/O Allan William Russell TRIGGS RAAF (Later MBE, DFC), and the incident occurred on 12 August 1942 (No.172 Sqn Wellington VIII BB503 & No.461 Sqn RAAF Sunderland II T9090:UT-B).
Not quite what you want, but you will find a fairly comprehensive account of the incident here:
http://static.awm.gov.au/images/coll...070684--1-.PDF
See: p.31-2 of 38.
Col.