Editing AS-201 (section)

===Spacecraft===
{{Main|Apollo command and service module}}
The command and service module CSM-009 was a Block I version, designed before the [[lunar orbit rendezvous]] method was chosen for the [[Apollo program|Apollo]] lunar landing; therefore it lacked capability to dock with a [[lunar module]]. Block I also employed preliminary designs of certain subsystems, and was heavier than the Block II version with lunar mission capability. All previous command and service modules flown (with one exception) were [[Boilerplate (spaceflight)|boilerplate]] versions.<ref name="AS201post">{{cite report|title=Postlaunch Report for Mission AS-201 (Apollo Spacecraft 009) |url=https://ntrs.nasa.gov/api/citations/19670074061/downloads/19670074061.pdf |date=May 6, 1966 |publisher=NASA |access-date=May 12, 2025}}</ref>

CM-009 was the second production Block I command module to fly, the first being CM-002 flown on a [[Little Joe II]] rocket for the final launch escape system abort test, designated [[A-004]]. CM-009 varied from the production configuration by the omission of the guidance and navigation system; crew couches, displays, and associated equipment; and by the addition of a control programmer and open-loop emergency detection system.

SM-009 was the first production Block I service module to fly. It varied from the production configuration by replacement of the electrical power-generating [[fuel cell]]s with batteries, and omission of the [[Unified S-band|S-band]] communication equipment.

The launch also included a Block I launch escape system (LES), and the first flight of the Spacecraft–LM adapter (SLA) which connected the spacecraft to the launch vehicle.