Captain Maughan, who said he was called a "Jock" who should go back to Scotland, was defeated on a legal technicality after he admitted he had not followed the BA complaints procedure.
Captain Maughan claimed he had been continuously victimised by BA since he spoke about the casual racism of older pilots working for the company that calls itself "the world's favourite airline", The Independent reported.
His Asian origin wife objected to hearing the words "coon" and "ragheads" used in conversation in the cockpit.
The judge said he could appeal against a written warning he received from BA at a further hearing on June11.
During the Watford tribunal, Captain Maughan said the company had a "canteen culture of racism".
He said he tried to alert senior management to the abuse, but was told it was a private matter.
He said one flight officer complained to him that there were too many Asians living in Britain, and also claimed that an English pilot sent him racially abusive letters and emails.
Captain Maughan was given a final written warning from BA. He claims the warning was part of a campaign of victimisation.
A BA spokesman said it would "vigorously defend" Maughan's appeal against his written warning. (ANI)