CASE-1109 CLOSED opened 2019-05-15 · last reviewed 2019-08-01

Unit 9 Stop

Investigation of an autonomous stop that proved correct, and of the hours spent trying to prove it wrong.

Uncertainty is part of the file. Findings remain subject to review.

Lead
Directorate V
Status
CLOSED
Opened
2019-05-15
Last reviewed
2019-08-01

Known

  • Unit 9 stopped under a published stop condition (SEN-19-034).
  • Operators spent hours attempting to override or disprove the stop.
  • Post-review retained the stop condition.

Open questions

  • Would a different operator crew have accepted the stop sooner?

Competing explanations

  1. False positive stop — rejected.
  2. Correct stop with operator disbelief as the lasting finding — retained.

Evidence

  1. SEN-19-034
  2. SEN-22-018
  3. SEN-23-041

Counter-evidence / limits

  • Attempts to prove a false-positive stop failed under review.

Timeline

  1. 2019-05-14

    Field report

    SEN-19-034

  2. 2019-08-01

    Closed — stop condition retained

Disclosure history

  1. 2019-05-15 — Case opened
  2. 2019-08-01 — Closed; stop condition retained in public guidance

Current status / finding

Closed. The stop condition was correct; the operators' disbelief is the lasting finding.

Uncertainty is retained on purpose. This finding is the current institutional position and remains subject to further evidence.

Inspect in discovery graph →