TM 1-1520-253-23
Task
Description
a. Preparation of Part:
Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
b. Precleaning Procedure:
Refer to TM 1-1500-344-23.
c. Penetrant Application:
The penetrant may be applied by brushing, spraying, or dipping.
d. Penetrant Dwell:
Allow a minimum of 30 minutes dwell time to a maximum of
240 minutes. Extended dwell time may require rewetting of parts.
e. Penetrant Removal/Rinse:
Rinse the part by waterwash using a low-pressure spray
(pressure not to exceed 20 PSI) and a temperature of
16 to 38 (60to 100 ). DO NOT OVERRINSE.
C
C
F
f. Drying Operation:
The parts should be dried in a circulating air dryer with a tem-
perature range from 38 to 60 (100to 140 ). The
C
C
F
time in the dryer should not exceed the time necessary to
completely dry the surface of the parts.
g. Developer Application:
The dry developer is sprayed or dusted lightly over the part to
be inspected. Shake or blow off with low oil-free air to
remove excess developer.
h. Inspect:
Perform inspection under black light.
i. Materials:
Type I, Method A, Level 3 or 4 (water-washable) Penetrant.
