MDS cross-ATA role
MAX maintenance data pages can expose data from several ATA systems, making ATA 31 a useful evidence interface rather than the source of every fault shown.
Use this as a refresher
Place the idea inside the full system chain: source/input → control → physical response → sensing/indication → consumer/result. If the quick note seems to conflict with the aircraft in front of you, stop and confirm configuration, effectivity and current approved data.
Maintenance boundary: this is a study reminder, not a task instruction.