What is the allowable runway slope variation?

What is the allowable runway slope variation?

• A. +/- 1%
• B. +/- 2%
• C. +/- 3%
• D. +/- 0.5%

Answer: (B)

Runway slope variation is how much the actual slope can differ from what the performance data assume. For the ERJ 175, the published limit is plus or minus 2 percent. That means you can rely on the takeoff and landing performance data with slopes up to 2% uphill or downhill; steeper slopes aren’t covered by the charts and require alternative calculations or data. The other options don’t fit because the manufacturer’s limitation is broader than 0.5% or 1%, and narrower than 3%, with ±2% being the standard validated range.

Runway slope variation is how much the actual slope can differ from what the performance data assume. For the ERJ 175, the published limit is plus or minus 2 percent. That means you can rely on the takeoff and landing performance data with slopes up to 2% uphill or downhill; steeper slopes aren’t covered by the charts and require alternative calculations or data. The other options don’t fit because the manufacturer’s limitation is broader than 0.5% or 1%, and narrower than 3%, with ±2% being the standard validated range.