The airline apologised to a passenger who complained he saw him viewing the pics on a long-haul flight.
David Jones, 35, flying to China with his wife, said he was shocked to see a captain flicking through the snaps on his iPad in a front-row seat.
The pilot — on a rest period — viewed them for around 30 minutes while the cabin lights were dimmed before heading to the toilet, according to Mr Jones.
The accountant, of London, had woken from a snooze in his front seat nearby and said: “The lights were off and the whole cabin was asleep.
“He flicked through image after image for about 30 minutes, went to the bathroom, came back and went to sleep.”
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Mr Jones, who took pictures, told BA when he arrived in Shanghai.
He received an apology message from BA customer relations, vowing to investigate and take “appropriate action”.
We told last September BA sacked pilot Mike Beaton after he snorted cocaine off a woman’s bare breasts at a party in South Africa before trying to fly a packed jet to the UK.
And in 2019, we revealed a BA captain was suspended amid claims he pleasured himself at a jet’s controls while wearing stockings was back flying.
BA declined to comment.