It seems unlikely that you are seriously asking a question about the servicing of the Russian Mil MI-8 military helicopter. Provide more detail in the question, or clarify what you are talking about.
There is no drain plug for air conditioning. All is done through the service ports with a recovery / charging station machine. Some gm compressors have a crank case plug, but that is not a drain plug; it is to add oil when servicing the compressor.
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There isn't an "AC drain line". Refrigerant is recovered through the schrader valve on the high pressure side. Servicing an AC system is not a "do-it-yourself" task, especially when it comes to recovering, handling, and storing refrigerant.
You can buy a manual on line fot the specific automobile you have that has all the answers to servicing that certain make and model. My husband just boutgh one for his auto to find out how to drain and refill the transmission fluid.
Second line servicing includes all servicing of air craft components and systems laid down in servicing instructions.
On a 1991 Oldsmobile Cutlass SE, the AC drain line is typically located on the passenger side of the vehicle, near the firewall. If the AC is draining into the interior, it may indicate that the drain line is clogged or kinked. You can inspect the rubber drain line for obstructions or damage and clear it to ensure proper drainage. If necessary, consult a repair manual for specific guidance on accessing and servicing the drain line.
On a 2000 Land Rover Discovery, the radiator drain is typically located at the bottom of the radiator on the driver's side. It is a small petcock or drain valve that can be opened to allow coolant to flow out for draining or servicing. You may need to access it from underneath the vehicle, so ensure it's safely lifted and supported if needed. Always make sure the engine is cool before attempting to drain the radiator.
A 98 Chevrolet 3500 truck holds 3 gallons of antifreeze. Much of the coolant is stored in the block which is difficult to completely drain when servicing.
That is the correct spelling of "servicing" (doing maintenance or repair).
Concord Well Servicing was created in 1979.
the oil drain plug is located on the right side of the motor near the front, a little ways back from the fly wheel it points out toward the wheel.....
Planned aircraft maintenance is calculated upon a combination of a calendar-based and a flying hour/landing cycles system of servicing procedures. To equalise servicing downtime and to maximise servicing opportunities, the actual maintenance task is split into equalised servicing procedures. This is where parts of different servicing checks are carried out between major servicing cycles