FA-66199 / Aviation weight and balance / Member archive

Removed items shift the index as if added · case 04

Offloading a forward bag moves the index the same way as loading it.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Input {'tow','mtow','index','index_limits','max_lmc_weight','max_lmc_index','changes':[['add'|'remove', kg, index effect of adding]]}. The weight tolerance applies to the gross sum of all changed weights (<= limit allowed); removals negate weight and index; |net index| <= limit. Then new TOW <= MTOW and new index within inclusive limits, else 'NEW_LOADSHEET'. Return ['LMC', new TOW, new index r1].

Why this case matters

Last-minute changes may be annotated on an issued loadsheet only within weight and index tolerances; offsetting changes must not hide large movements.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
offload moves index	`["LMC", 67800, 55.4]`	`["LMC", 67800, 48.6]`	Failed

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