When the stack fails, you don't blame the weld—you trace the thermal signature back to the first bolt that breathed wrong.
In the gymnasium at 5:47 AM, when the stripper pH reads 12.8 instead of 13.5, you don't push forward hoping the dwell time compensates. You stop. You recalibrate. You document the deviation.
| LAYER | MEASURED | TOLERANCE | STATUS | COUNTERMEASURE |
|---|---|---|---|---|
| STRUCTURAL INTEGRITY | UNKNOWN | ±0.05mm gap | CRITICAL | Breath-count grid inspection |
| PROPELLANT MIX | UNKNOWN | O/F ratio 2.36±0.02 | UNVERIFIED | Mass spectrometry sweep |
| IGNITION SEQUENCE | ABORT | T+0.000s sync | FAILED | Full sequencer reset |
| VENTILATION PATHWAY | N/A | 300mm/hr clearance | NOMINAL | Continue to next stage |
Every abort teaches you where the margin lived. In Manassas, that margin is the difference between a floor that strips clean and one that delaminates under the next crew's boots. In Boca Chica, it's the 85 Nm ± 2% on a nozzle bolt that decides whether the flame finds the sky or the sand.