She arrived at Pearl Harbor on 24 July. Her repairs were quickly completed, and in mid-August, she sailed west again. On 27 July, she entered the southern Kuril Islands. On 31 July, while the submarine was diving, the conning tower hatch failed to latch, and subsequently flew open. The pumproom was flooded before the boat could be surfaced. Substantial damage to her electrical circuits resulted and "Seal" retired eastward to make temporary repairs. The work continued for a week, and on 8 August, as the air compressors were being jury-rigged to provide sufficient air pressure to launch torpedoes, she returned to the Kurils and crossed into the Sea of Okhotsk. On 17 August, she attacked two freighters with no success. On 25 August, she cleared the area, and on 4 October, she returned to Pearl Harbor.