787 IRS on during turnaround- engineering requirement?
One engineer recently told me that they prefer us to leave the the IRS on as it facilitates wireless communication of engineering data between the aircraft and the centre of the maintenance universe?
Our shutdown checklist say they should be off. Our Flight Crew Operating Manual says "As required". Spoken to four Monarch engineers none of whom could suggest a good reason for leaving the IRS on?
Any thoughts..thanks in advance!