Do they actually fail you for not getting the PAN and the MAYDAY relay in the correct order?
In real life your MAYDAY is more likely to go
'G-CD mayday, mayday, mayday, engine failure, stand by...'
especially if you are on a radar service at the time - they know where you are! My FI drummed into me that otherwise the one thing you MUST tell them is where you are, or they won't know where to direct the SAR to. So if it happened for real (when it happens for real...!) I will probably just about managed 'mayday x3, engine failure, 5 miles north of Blanktown, stand by' before getting on with the important business of landing the plane.
Tim