AD-50-10-02
Carb Heat Hose


Category: navion, carburator, hose, exhaust

Applicability: Serial numbers NAV-4-2 Through NAV-4-1790.

Supersedes: n/a

Compliance: As soon as possible, by September 1, 1950

Procedure: The above aircraft employ flexible hose, Ryan Drawing 145-42202, between the exhaust shroud and the carburetor heat valve. This hose
has shown a tendency to deteriorate with age and may collapse, resulting in a considerable loss of engine power. An inspection of these hoses should be made not later than March 20, 1950, and after each 25 hours of aircraft operation until replacement is made with the hose mentioned below. All hoses found to be in poor condition should be replaced immediately by wire reinforced hose. Arrowhead Rubber Co. hose type 8AX (Ryan Drawing No. 145-42202- 3) or equivalent is satisfactory.
 

Notes: Ryan Service Letter No. 67 dated February 7, 1950, also covers this subject.


AD-50-10-02