FA-66065 / Aviation weight and balance / Member archive

Landing status tests the takeoff CG · case 05

A takeoff CG inside limits is reported OK even when the burn drives the landing CG out.

Member previewVariant 5 · 3 implementations · 9 checks per implementation

Case contract

Input {'tow','tocg','burn_gal','fuel_arm','density','mlw','env':[fwd,aft]}. Burned fuel weight = gallons*density removed at the fuel arm. Status 'MLW' if landing weight exceeds MLW (checked first), 'CG' if landing CG outside the inclusive envelope, else 'OK'. Return [LW r1, LCG r2, status].

Why this case matters

Landing CG differs from takeoff CG because fuel is removed at the tank arm; landing weight has its own structural limit.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
burn moves CG forward out	`[2060.0, 34.43, "OK"]`	`[2060.0, 34.43, "CG"]`	Failed

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