Safety Recommendation
The Australian Transport Safety Bureau recommends that the Civil
Aviation Safety Authority assess the safety benefit of mandating
Saab Aircraft AB Service Bulletin 340-24-026 incorporating
generator control unit modification number 2533.
CASA has assessed the safety benefit of mandating SAAB Service
Bulletin 340-24-026 and can see no case for mandating modification
2533, which is essentially a product improvement.
The original issue of the Service Bulletin was given "recommended"
status by the manufacturer. However, when the Bulletin was revised
in October 2001, the status was downgraded to "optional".
Therefore, given the downgrading of the manufacturer's status and
the fact that this is a product improvement, CASA can see no safety
benefit in mandating this Bulletin.
