52-04-04 MARTIN: Applies to All Models 202 and 202A Aircraft.
Compliance required not later than July 1, 1952.
Provide two separate and individually protected circuits for instrument panel lighting- each circuit to provide adequate panel illumination for necessary flight instruments.
(G. L. Martin Co. Service Bulletin 118 and Trans World Airlines Engineering Order 5643 cover this same subject for the 202A).