With the test item in its appropriate logistic configuration, stabilize the test item at controlled ambient conditions. (Part One, paragraph 5.1).Step 2. Transfer the test item in no more than one minute to an atmosphere at temperature T1 or T2 that will produce the thermal shock specified in the test plan, and stabilize the temperature for a period as determined in accordance with paragraph 2.3.5.Step 3. Transfer the test item to controlled ambient conditions in no more than one minute, and stabilize the temperature for a period as determined in accordance with paragraph 2.3.5.Step 4. If required in the test plan, evaluate the effects of the thermal shock on the test item to the extent practical.Step 5. Either tailor additional shocks by repeating steps 1-4, or proceed to Step 6.Step 6. After all required shocks are completed, examine the test item and, if appropriate, perform an operational check. Record the results for comparison with pretest data. If the test item fails to operate as intended, see paragraph 5 for analysis of results.503.5-