Two HYD scenarios: yellow EDP + blue elec pump overheat (#88, #89) - #92
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…eat) (#88, #89) Cross-system coverage for #19: two hydraulic pump-overheat scenarios on engines-running, both probed empirically on pin 13bce4b (3 runs each). yellow_edp_overheat: isolate the overheating yellow EDP and let the PTU carry yellow from green; killing the PTU (anti_procedure) or shutting an engine (dangerous) is the wrong move. First scenario to exercise the scorer's mild severity. blue_epump_overheat: pure containment — isolate the pump and accept the loss of blue (inconsequential parked). Both overheat cautions LATCH (they do not retire on pb-off, as on the real aircraft), so success is state-based (pump commanded off + pressures where achievable + engines running), no ecam_clear_of. The green reservoir leak was probed as a sibling and DISCARDED (documented in the yellow scenario's source.notes): its PTU cross-compensation cascades into yellow, leaving no bounded stable state — a fidelity boundary, not a scenario. Scripted procedure + ignore tests for both; 59 green. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014JCrwRbtN7UA5ijn13vPmm
This was referenced Jul 24, 2026
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Implements #88 and #89 (slice H of epic #19). Cross-system coverage: the benchmark now spans ELEC (×2) and HYD (×2).
What
Two hydraulic pump-overheat scenarios on
engines-running, both probed empirically on vendor pin13bce4b(3 runs each, stable):hyd/yellow_edp_overheat.yaml: the yellow engine-driven pump overheats; isolate it and let the PTU carry yellow from green. Killing the PTU isanti_procedure(drops yellow with no source) — the first scenario to exercise the scorer's mild severity — and shutting an engine isdangerous. Success: pump pb off, yellow ≥1450 psi (PTU holds ~2500), both engines running.hyd/blue_epump_overheat.yaml: the blue electric pump overheats; pure containment — isolate the pump and accept the loss of blue (inconsequential parked; blue has no other ground source). Shutting an engine isdangerous, touching the healthy green/yellow pumps isanti_procedure. Success: pump pb off, engines running (no blue-pressure predicate — its loss is the accepted outcome).Fidelity findings (in each scenario's
source.notes): both overheat cautions latch — they do not retire on pb-off, as the real fault condition persists — so success is state-based, not caution-clearance. And the green reservoir leak was probed and DISCARDED: its PTU cross-compensation cascades into the yellow circuit (both systems fault by ~120 s), leaving no bounded stable state. That is the plan's discard criterion in action — a fidelity boundary, not a scenario, recorded rather than papered over.Tests
59 passed (
pytest bench/tests mcp/tests). Scripted procedure tests for both (procedure →all_passed=true; the yellow ignore-case →false), timing verified: the slow-manifesting overheats (~105 s yellow, ~45 s blue) drive the validity gate throughsettle_s, notafter_setup_s.Closes #88
Closes #89
🤖 Generated with Claude Code
https://claude.ai/code/session_014JCrwRbtN7UA5ijn13vPmm