Includes these tests from Boeing D6-36440E:

7.3.3.3 - Ripple Voltage Cat. Z - 14VDC Continuous

7.3.3.3 - Ripple Voltage Cat. Z - 14VDC Discrete

7.3.3.3 - Ripple Voltage Cat. Z - 28VDC Continuous

7.3.3.3 - Ripple Voltage Cat. Z - 28VDC Discrete