Category: navion, carburator, hose
Applicability: All Model B Aircraft
Supersedes: AD 51-19- 03
Compliance: No later than June 15, 1952.
Procedure: Due to reports of engine malfunction caused by collapse of flexible ducts in the air induction system, it is necessary to replace the section P/N 146-42207 ducting between the carburetor air filter assembly and the carburetor air mix box with wire reinforced ducting, or its equivalent.
Notes: Ryan Field Service Bulletin No. 16, dated February 12, 1952, covers this same subject.
AD-52-08-02