Nairobi 747
Ref the Lufthansa 747 crash. If my memory is correct, then I think that a little while before this a similar situation occurred with a BOAC 747, it did not result in an accident. I seem to recall that the incident was reported to Boeing but the information was not promulgated before the Nairobi crash. Maybe someone more knowledgable than myself can add further comments.
Regards Den.