50-41-02 MARTIN: Applies to All Model 202 Aircraft.
Compliance required not later than December 1, 1950.
To maintain a sufficient hydraulic reservoir capacity for the operation of the hydraulic units in the event of failure in the emergency brake system, install a hydraulic fuse (Simmonds P/N G45-6E-402-80) or equivalent, adjacent to the main line tee in the emergency brake system between the main line and the emergency brake accumulator.
(Martin 202 Service Bulletin No. 105 covers this same subject.)
When the manually operated charging valve is installed in accordance with AD 51-11-01, this hydraulic fuse is no longer required.