Large transport category airplanes: Reciprocating engine powered: Weight limitations

This regulation establishes weight limitations for reciprocating engine powered large transport category airplanes operating under Part 135.

You cannot take off from or land at airports whose elevation falls outside the range for which the airplane's maximum takeoff and landing weights have been determined by the manufacturer. This applies to your departure airport, destination airport, and any alternate airports you designate in your flight plan.

Additionally, you must ensure your actual takeoff weight doesn't exceed the maximum authorized for your departure airport's elevation, and your expected landing weight (accounting for normal fuel and oil consumption) doesn't exceed the maximum authorized for your destination's elevation.

These restrictions exist because airplane performance varies significantly with altitude—higher elevations mean thinner air, which affects engine power, lift generation, and stopping distance. The manufacturer determines safe weight limits for specific elevation ranges, and you must operate within those parameters.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*