To be eligible for any OEM warranty consideration, affected engines need to comply by October 1, 2017.
If you replace or change the magnetic compass or components on your aircraft’s compass system, it is appropriate to swing the compass to verify or align it to minimize errors.
0xygen masks are an accessory that we hope we never need. But if the cabin pressurization system fails and our altitude is above safe levels, we really want those masks to work correctly.
If the transponder on your aircraft is off frequency, it could begin to reject the beacon from ATC.