At 16.03 hours on 27 Aug 1940 the Eva (Master Ingvald Vaage), a straggler from convoy SC-1 since 16 August due to unsuitable coal, was hit on the starboard side between hatch #3 and #4 by one torpedo from U-28 about 60 miles east of Rockall. As the stern settled the crew abandoned ship in the lifeboats, three of them injured. One crewman was lost. The U-boat surfaced after 30 minutes and fired 22 rounds from the deck gun into the waterline because the ship stayed afloat on its cargo. She caught fire after 17 hits were scored and was then left in a sinking condition, while the lifeboats headed for the Hebrides. On 30 August, the survivors made landfall at Boligarry, Isle of Barra.

An aircraft, HMS Hurricane (H 06) (LtCdr H.C. Simms, RN) and HMS Havelock (H 88) (Capt E.B.K. Stevens, DSC, RN) were sent to assist after a distress signal from Eva was heard ashore. HMS Hurricane (H 06) arrived that night and though finding no survivors, extinguished the fire on board and requested a tug, because they assumed that she could be saved. But the Eva was washed ashore one mile from Butt of Lewis Lighthouse and was wrecked.