"Self-inflicted" heavy bombers damages in 8th Air Force

I just read a page dedicated to the "Causes of heavy bomber damage in 8th air force" for January to may 1944. We can read that 83,7 % of the damages were due to Flak, 4,5% to 20 mmm shells, .2% was due to fire from friendly aircraft...and so on ... and that 1.4 % was "self-inflicted" damage. What kind of incidents can be put in this "self-inflicted damage" category? Regards

This old thread has some discussion that might pertain to this topic.

DerAdlerIstGelandet said:

This old thread has some discussion that might pertain to this topic.

Were the tails protected against their own rear/upper gunners gunfire?

Were the tails of the aircrafts anyhow protected against the gunfire of their own rear/upper turret gunners? I speak generally about all kind of the bombers or battle aircrafts as light bombers as TBG,SBD,IL2 and also about medium and heavy bombers as A-20, B-25 or B-17.... Had their machine...

ww2aircraft.net

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Thank you DerAdlerIstGelandet