Hi,
According to Genzan Air Group’s “Sentô Kôdô Chôsho (roughly translated to “preliminary action reports”) Dec. 1941 – May 1942”, Japan Center for Asian Historical Records (
https://www.jacar.go.jp/english/index.html ), Reference Code: C08051612300, 27th and 28th images), followings are mentioned.
6. Apr. 1942. Akyab harbour bombing, the number of Nells was 26, not 27.
Bombing time: 2nd Squadron released 1229 (the Kôdô Chôsho does not mention a time zone but probably GMT + 9 hrs.), all bombs missed.
1st Squadron released 1233, all bombs missed.
3rd Squadron released 1240, one bomb hit the stern of a minelayer and sank her.
Total released bomb number (including Akyab airfield bombing): 106 60kg-bombs, 26 250kg-bombs.
Best regards!
JYoung