27 Nov 1943
Aircraft attack, aircraft shot down: British Wellington HF153 (172 Sqdn RAF/O, pilot P/O T.B. Wilkin)

At 21.22 hours the boat was attacked by the Leigh Light equipped Wellington based on the Azores, escorting the combined convoy SL-140/MKS-31. The aircraft made a strafing run and was hit by AA fire in a second attack. Its subsequent crash was witnessed by U-262 and U-238 which picked up the two survivors F/S Nicolas J. Martin and Sgt Thomas B. Semple as prisoners, the other five crewmen were lost. Semple was the radio operator and later convinced the Germans during his interrogation that the Allied aircraft were able to passively locate the U-boats by homing in on the radar detection devices. This deception led to the order to turn off the Naxos devices.

29 Nov 1943
On 29 Nov, 1943 east of the Azores, in position 39.33N, 19.01W, aircraft of the US escort carrier USS Bogue depth charged a contact. The attack was thought to have destroyed U-86.

This attack was in fact against U-764, which escaped undamaged.

30 Nov 1943
Depth charge attack on 29 Nov. 1943 east of the Azores, in position 39.33N, 19.01W, by aircraft of the US escort carrier USS Bogue formerly credited with sinking U-86.

This attack was in fact against U-764, which escaped undamaged.

23 May 1944
The boat was attacked by an enemy aircraft and damaged slightly. One crew member was wounded.

15 Jun 1944
After torpedoing the British frigate HMS Blackwood (she sank the next day) the boat was attacked by nearby allied escorts causing, among other things, damage to the snorchel apparatus. The boat aborted to Brest, arriving on June 21. (Sources: Blair, vol 2, page 586)

5 recorded attacks on this boat.