Encyclopedia Astronautica
1967.09.15 - Short circuit on Apollo CSM 020

A short circuit occurred during checkout of CSM 020 at North American, Downey, Calif.

External power batteries in parallel with the reentry batteries had indicated low power and were replaced. During preparations to continue the test, arcing was reported and emergency shutdown procedures were applied. Investigation was under way to determine the cause of the arcing. Initial indications were that at least 100 amps were imposed on a small portion of the spacecraft wiring, causing some damage to the spacecraft batteries.

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