Re-Testing an Apollo Guidance Computer Module that Failed Certification Testing

Hackaday reports that Mike Stewart obtained a rope driver module from the Apollo Guidance Computer — a space-grade component from Raytheon that had failed its original certification testing in the nineteen-sixties. Using archived test documents, he attempted to reverse-engineer why it was rejected, discovering marks suggesting the module had been opened and repaired. After running basic acceptance tests, everything checked out, suggesting this was a refurbished engineering-use module rather than flight hardware, though one channel showed slight calibration drift from either an original fault or fifty years in storage.

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