Aircraft attract lightning and every strike has its own personality. Even a suspected strike reported from the pilots warrants a detailed inspection.
Duncan Aviation technicians didn't give up when the cause of an intermittent nose wheel shimmy proved evasive.
I shake my head in amazement every time a box arrives at Duncan Aviation returning units from a core exchange with no thought or care taken to ensure the units are not damaged during shipping.
Intermittent flag warnings on the altimeter can be a nuisance. But one thing is for certain, flag warnings should not be ignored.
Are you receiving amber "NWS Fail" messages or experiencing uncommanded steering operations? If so, you may want to look at Service Bulletin 100-32-25.