Are you suggesting the L1011 has a comparator warning light
Not at all.
You might prefer to read again.
...those so modified via service bulletin incorporated a comparator/resolver in the ADF system, to indicate a reversed sensing condition.
It caused a flag to appear in the respective RMI indication.
Obviously its been decades since I've seen an L1011 ...
Yup, therein is the problem, alright.
