http://www.aaib.gov.uk/cms_resources...OF%2004-12.pdf
The commander did not want to “do
nothing” and decided to look in the ‘FUSELAGE FIRE
or SMOKE’ checklist even though he knew the checklist
was designed to remove smoke from the aircraft and
that none had been reported...The commander was not prepared to
assume that the warning was spurious.
Another good example of a break down in CRM. If they had used all the resources at their disposal, including cabin crew, they could have reviewed the situation and perhaps saved themselves a lot of hassle. Instead they shut down a lot of vital systems for no real reason or benefit, knowing that it was incredibly unlikely to be those systems that were causing the fire indication.
It is of course easy to sit in a classroom and say what should of been done, but in the heat of the moment it's sometimes difficult to sit on one's hands and do nothing while you just assess the situation.