Originally Posted by borghha
The prelimanary, but updated reports state clearly that a MLG component (MSV) was replaced by a nosewheel MSV that had been 'worked' by maintanance services. In order to fit this modified part into the MLG, fttings from the original MSV were used, those possibly 'hiding' an O-ring that later on caused the accident.
AFAIK - That is a BBD approved procedure, discribed in the AMM.