Forgive a GA perspective please, which is in fact relevant here: This prompted memories of
This report into a non-fatal Extra 300 crash which included a section titled, ‘Effect of ‘wet wings’’ (Page 59 in the original bulletin). The reference source was a NASA Langley paper, AIAA-86-2606 ‘Potential Influences of Heavy rain on General Aviation Airplane Performance’ by RE Dunham Jr.
A fascinating investigation for two reasons, the other being the way it emphasised the value in a thorough on-foot exploration of the entire site
and its surroundings.