(b)  
Flush the bottle two times in hot potable water that does not have minerals.

 (c)  
Flush the bottle two times in distilled water.

 (d)  
Drain the water from the bottle.

 (e)  
Dry the bottle in the air of a laminar flow bench in a clean room.

 NOTE: If a laminar flow bench is not available, put the bottle
____ in a clean dry room, with the top in a down position. Keep all persons from the room until the bottle is dry and you put a cap on it.
 (f)  
After the bottle is dry, install a cap on the bottle.

 (g)  
Put the bottle in a new polyethylene bag.

 (h)  
Seal the bag with a knot or tape.

 (i)  
Identify the bag.

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737-300/400/500MAINTENANCE MANUAL
 S 116-003
 (2)  Do these steps to clean the glass bottle:
 (a)  
Flush the bottle in a solution which has 20% by volume of nitric acid.

 (b)  
Flush the bottle two times in hot potable water that does not have minerals.

 (c)  
Flush the bottle two times in distilled water.

 (d)  
Flush the bottle with clean isopropyl alcohol which was put through a filter.

 (e)  
Flush the bottle with clean petroleum ether which was put through a filter.

 (f)  
Dry the bottle in the air of a laminar flow bench in a clean room.

 NOTE: If a laminar flow bench is not available, put the bottle
____ in a clean dry room, with the top in a down position. Keep all persons from the room until the bottle is dry and you put a cap on it.
 (g)  
After the bottle is dry, install a cap on the bottle.

 (h)  
Put the bottle in a new polyethylene bag.

 (i)  
Seal the bag with a knot or tape.

 (j)  
Identify the bag.

 H. Prepare for the Check
 S 866-015
 WARNING:  MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. THE AILERONS, RUDDERS, ELEVATORS, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Supply hydraulic power to the hydraulic systems with the electric pumps (AMM 29-15-00/201).

 S 866-016

 (2)  
Operate all of the flight controls 6 to 8 times to mix the hydraulic fluid.

 S 866-017

 (3)  
Remove hydraulic power from the hydraulic systems
 (AMM 29-15-00/201).

 NOTE: Get the samples of the hydraulic fluid not more than one hour
____
 after you stop the hydraulic system.

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737-300/400/500MAINTENANCE MANUAL
 I. Procedure
 S 686-004
 (1)  
Open the sampling valve on the reservoir to supply a smooth flow of fluid.

 S 686-005

 (2)  
Drain a minimum of one pint of hydraulic fluid before you get a sample.

 S 686-006

 (3)  
Remove the cap from the polyethylene bottle or glass bottle.

 S 686-007

 (4)  
Put the bottle in the fluid flow but do not touch the sampling valve.

 S 686-008

 (5)
When the bottle is full, remove the bottle from the fluid flow.

 NOTE: Do not close the sampling valve while the bottle is in the
____ fluid flow. This can loosen the contamination and cause it to get into the sample.
 S 686-010
 (6)  
Install the cap on the bottle.
　
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