Yup - go to the manufacturer
Have worked under many chief pilots and technical pilots who got the job because no one else wanted it and not because of ability.
Had a very serious navigation fault over the North Pole on the DC 10.
Resulted in having to disconnect the NAV mode - which wasn't allowed - and intercept the correct track using Lat/Long. Getting it wrong we would have run out of fuel.
Reply to a technically explicit voyage report was a photocopy of a manual page stating that I was not allowed to disconnect the Nav mode above 65 degrees.
Eventually the problem went to Douglas who couldn't answer it either.
Suspect it was a programming glitch as of 30 odd polar flights I did it was the only one that went over the geographical pole.
Most office wallahs are there because they don't like flying and they want weekends off, technical competency ain't in the job description.