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Section III. SAMPLING AND TESTING
Up
TB-55-1500-334-25 Conversion of Aircraft to Fire Resistant Hydraulic Fluid Manual
Next
Sampling Intervals.
TB 55-1500-334-25
The following table consists of information on how
3-3. Where to Take Fluid Samples.
and where to sample components.
Aircraft
Components
How To Sample
Where to Sample
UH-1, AH-1
Hydraulic System(s)
15" x 3/8" tubing
Filler neck
OH-58
Hydraulic System
15" x 3/8" tubing
Filler neck
CH-47
Flight Control Systems (2)
15" x 3/8" tubing
Filler neck
Utility Hydraulic System
Drain into sample
Bleed valve of
bottle
Utility hydraulic
system return line
CH-54
First Stage System
15" x 3/8" Tubing
Filler Neck
Second Stage System
Utility System
Cargo System
OV-1
Hydraulic System
15" x 3/8" tubing
Filler neck
UH-60A
See TM 55-1520-237-23-4
Servicing
Hydraulic Test Stands
15" x 3/8" tubing
Filler neck
Equipment
NOTE
If proper procedures are followed for
conversion of hydraulic dispensers (app.
F), there is no requirement of fluid
sampling. If the presence of MIL-H-5606
is suspected in a converted system, a
sample can be drawn by pressing the red
button valve and draining the fluid into a
sampling bottle.
to prevent contamination.  Size, source, and National
3-4. Sampling Supplies.
Stock Numbers (NSN) are listed below. Tubes are issued
a.
Sampling Tubes.
Sampling tubes are
in bags of 25.
polyethylene tubes which have been sealed on both ends
NATIONAL STOCK NUMBER
SIZE
SOURCE
15" long x 3/8" OD
B-17
b. Sampling Bottle. The sampling bottle is a 4-
oz, polyethylene, screw cap bottle. The National Stock
Number and source are listed below.
NATIONAL STOCK NUMBER
TYPE
UNIT OF ISSUE
SOURCE
Polyethylene
Each
S9G
c. Sack, Shipping. The mailing bag is the air
insulated sack listed below:
NATIONAL STOCK NUMBER
SIZE
UNIT OF ISSUE
SOURCE
6" x 10"
250 each per carton
GKO
Change 5
3-2

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