(b) Rip Panels 

The rope which opens the forward rip panel can be reached from •the forward door; the rope which opens the aft panel can be reached from the aft door. They are dyed red to avoid confusion with the other ropes. 

(4) Controls and Auxiliaries 

(a) Valve Controls 

The air and gas release valves can be operated man~ ually from the pilot’s instrument panel, Fig. XI. Every valve has an opening arid a closing control. Pulling the opening control lifts the valve off its seat and releases air or gas as the case may be. The valves should close by themselves when the opening control is released. 

A closing control is provided, however, to force the valves closed in case they should stick. The control is also used to make certain that the gas valves are closed, and that no gas is being lost when flying near pressure height. 

The following check procedure of the valves is recommended: 

1. Before take-of.f, crack all valves 6pen for a short instant to make ce~tain that the valves and telltale lights operate satisfactorily. 

2. When flying close to pressure height, pull closing control of gas valves from t ime to time. 

