2.2.9 BOARD LEVEL TEMPERATURE CYCLING
The concept of augmenting the black box temperature cycling with additional
cycling at the printed circuit board level should be considered. Hughes
Aircraft Company, on one program, "stores" their assembled printed circuit
boards in a temperature chamber for one week during which time 158 temperature
cycles are accrued. The boards are not powered or monitored. This comprises a
very cost-effective approach to reliability.