Hydraulic Pump running at switch on

[sgmret]

Although I don't own a Cessna 337 at present I have owned two in the past. My first one was a 1973 G-model and the second a 1977 G-model. Shortly after I bought the first one in 1975 I had a mechanic give me what I considered some good advice at the time and I used it during the periods I owned both airplanes. That advice was to check the hydraulic gear pressure before each flight. He advised that before turning on the master switch or any other accessories, extend the gear handle and pump the doors open. Thereupon one can check if there are any leaks inside the doors. He cauthioned not to move the gear handle and that one can determine if the doors close tightly and securely as soon as you turn the master switch on as that activates the electric motor and closes the doors. Occasionally the gear doors were slightly opened if the aircraft sat for too long a period - perhaps two weeks or more.

Perhaps others have received the same advice and found it helpful as well.