46-42-01 GLOBE: (Was Mandatory Note 4 of AD-766-5.) Applies to Models GC-1A, GC-1B Aircraft Serial Numbers 3 to 228 Inclusive.
Compliance required prior to December 1, 1946.
Replace the aluminum alloy cabin heater valve assembly with one constructed completely of firewall material equivalent to Globe Valve Assembly, P/N 11-440-3623. This will provide a complete firewall of firewall material.
(Globe Customer Service Maintenance Bulletin No. 4 covers this same subject.)