Editing AS-201 (section)

==Problems==
[[Image:AS201 Command Module.jpg|right|thumb|AS-201 CM-009 exhibited at the Strategic Air and Space Museum.]]
There were three problems encountered on the flight. The service module engine worked properly for only 80 seconds, interrupted by the presence of [[helium]] pressurant gas in the combustion chamber. Helium was used to pressurize the fuel tanks but should not have been in the combustion chamber. This was caused by a break in an [[oxidizer]] line that allowed helium to mix with the oxidizer.

The second problem was an electrical system failure which caused the command module to lose steering control during reentry. Last, measurements that were intended to be taken during reentry, failed due to a short circuit.<ref>{{cite web|title=Heat Shield, Fragment, Ablated, Apollo CM 009 |url=https://airandspace.si.edu/collection-objects/heat-shield-fragment-ablated-apollo-cm-009/nasm_A19731423003 |website=National Air & Space Museum |access-date=May 12, 2025}}</ref> Both of these problems were found to be due to incorrect wiring, and were easily fixed.