Originally Posted by
FlightDetent
More worryingly, this could teach the ground personnel to ignore the beacon light.
The logical question how do we check the beacon has a simple answer: the engineers would on a daily basis. Should it break mid-day, the redcap is sure to tell you and MMEL relief is available.
That itself is a good marker if you really need to verify its operation as a pilot before each flight. Items dispatchable i.a.w. MMEL are those, where another independent failure on the same system won't directly jeopardise the safe outcome. I.e. systems you can afford to lose with 2 levels of protection then remaining.
Simply put, for MMELable items it is OK to wait until they fail, no need to verify beforehand. As a general concept.
Thanks, FlightDetent. My question was not so clear.
What I was trying to bring to chat is just that: - If Red Beacon lights need to be "ON" during external lights check.
I agree to your answer.