61-13-01 CONVAIR: Amdt. 297 Part 507 Federal Register June 20, 1961. Applies to All Model 22 (880) Aircraft.
Instances of fire due to overheating of Bussman 60 and 70 amp type ACO and ACY limiters in the freon compressor and recirculation fan motor circuits have occurred. To preclude fires of this type, the following modifications must be accomplished:
Unless already accomplished, compliance with items (a) and (b) is required within the next 130 hours' time in service:
(a) Replace the Bussman 60 and 70 amp type ACO and ACY limiters and their holders which are located in the AC power distribution box with type AHB limiters and their holders.
(b) Replace the nameplates adjacent to the 60 and 70 amp limiters with similar nameplates made of a fire resistant material such as impregnated fiberglass.
(Convair Service Bulletin No. 24-42 covers this same subject.)
This directive effective June 20, 1961.