47-06-05 GLOBE: (Was Mandatory Note 8 of AD-766-5.) Applies to Models GC-1A and GC-1B Aircraft Serial Numbers 2 to 408 Inclusive; 1001 to 1216 Inclusive; and 2001 to 2137 Inclusive.
Compliance required prior to April 1, 1947.
Replace the present battery vent plugs of the tubular (deeply inserted) type of the Reading Model R-24L battery with the high nonspill ball seat type vent plugs. Clean and treat that part of the firewall and fuselage which has been subjected to the spill battery acid with a solution of sodium bicarbonate. This is necessary to prevent corrosion due to acid spillage.
(Globe Customer Service Maintenance Bulletin No. 14 covers this same subject.)