NASA's October 15 review of Artemis II reports that Orion's heat shield performed as expected during the four-person mission's return from the Moon. The spacecraft splashed down on April 10; the new account concerns the engineering examination afterward, rather than another flight.
The shield's exterior endured temperatures above 4,000 degrees Fahrenheit as Orion entered the atmosphere at about 39 times the speed of sound. NASA says cabin temperatures stayed in the mid-70s Fahrenheit, illustrating the enormous difference between external heating and the protected interior.
Engineers changed the entry trajectory after investigating unexpected char loss on the uncrewed Artemis I mission. The revised path reduced the time spent in the temperature range associated with that problem while retaining the shield's protective function during descent.
Postflight inspection identified nine locations with char loss, compared with 103 after Artemis I. NASA describes the reduction as roughly a factor of ten. These are observations from particular flights, not a promise that every future shield will behave identically.
The examination extends beyond photographs. Following initial work at Kennedy, the shield went to Marshall for further testing. Teams used internal X-ray imaging and samples, while laser measurements helped compare the spacecraft's thermal protection before and after flight.
The results inform later Orion vehicles, including changes to the permeability of Avcoat material. Continued analysis matters because a shield must survive a specific combination of heating, pressure and flight path. Artemis II supplies flight evidence that laboratory tests alone cannot provide.