TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 354 of 779
6-32. Ultrasonic Inspection of Cylinder
through e ,
contain the procedure for usin g
Barrel
(Part
No.
10865297,
FSN
cylinder barrel tester on part No. 10865297
(2815-765-9711) cylinder only.
a. General.
The following paragraphs, b
Figure 6-52. Cylinder barrel tester - 4910-937-4261.
b. Description of Test Equipment.
(1)
Reflectoscope.
An electronic instrument
to provide means of transmitting and receiving
pulsed ultrasonic energy, and interpretation for
detection of flaws in the cylinder.
(2)
Search unit fixture.
An adapter tha t
directs ultrasonic energy into the proper area of
the cylinder assembly, and is oriented to receive
energy reflected back from defective areas.
(3)
Master checking cylinder.
A portion of
the cylinder, properly prepared with a specific
defect, to act as a comparator tool. This cylinder
compares to a no-go gage relative to cracks in the
cylinder.
6-60
c. Functional Description of Equipment.
(1)
General.
This inspection techniqu e
utilizes ultrasonic wave propagation for a non-
destructive method of finding incipient cracks in
the cylinder. The principle of ultrasonic flaw
detection employs short bursts of high frequency
sound vibrations, generated by a piezoelectric
probe, transmitted into the cylinder barrel being
inspected. Should a crack or discontinuity exist
in the barrel, some of the sound wave energy will
be reflected back to the source. A return sound
wave, or echo, is converted into electrical energy
which is displayed on the screen as a vertical
indication on the horizontal (time) base line.
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