Conditions and concepts
Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached. The ordinary Part 107 maximum groundspeed is 87 knots(100 mph), absent an applicable waiver. The ordinary altitude limit is 400 ft AGL; within 400 ft of a structure the rule allows up to 400 ft above its immediate uppermost limit, subject to other restrictions. Ordinary Part 107 cloud clearance is at least500 ft below and2000 ft horizontally from clouds; both conditions matter.
Worked decisions
A proposed small UAS takeoff weight, including payload, is 54 lb. Which weight comparison is correct? Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached. The supported result is It is below 55 lb. A proposed operation has groundspeed90 mph and no applicable waiver. Which speed conclusion fits? The ordinary Part 107 maximum groundspeed is 87 knots(100 mph), absent an applicable waiver. The supported result is It is within the 100 mph limit. A structure is 180 ft tall. A drone remains within 400 ft of it and no stricter limit applies. What upper altitude follows the structure provision? Add the supplied quantities: 180 + 400 = 580 ft AGL. The added400 ft is conditional on the structure-distance premise, not an unlimited altitude allowance. The supported result is 580 ft AGL. A plan keeps600 ft below clouds and2200 ft horizontally away. Which clearance comparison fits? Ordinary Part 107 cloud clearance is at least500 ft below and2000 ft horizontally from clouds; both conditions matter. The supported result is Both stated minima are met.
A change that matters
A proposed small UAS takeoff weight, including payload, is 55 lb. Which weight comparison is correct? Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached. Here choose It is not less than 55 lb. A proposed operation has groundspeed100 mph and no applicable waiver. Which speed conclusion fits? The ordinary Part 107 maximum groundspeed is 87 knots(100 mph), absent an applicable waiver. Here choose It is at the ordinary limit. A structure is 250 ft tall. A drone remains within 400 ft of it and no stricter limit applies. What upper altitude follows the structure provision? Add the supplied quantities: 250 + 400 = 650 ft AGL. The added400 ft is conditional on the structure-distance premise, not an unlimited altitude allowance. Here choose 650 ft AGL. A plan keeps400 ft below clouds and2200 ft horizontally away. Which clearance comparison fits? Ordinary Part 107 cloud clearance is at least500 ft below and2000 ft horizontally from clouds; both conditions matter. Here choose Only the horizontal minimum is met.
Transfer check and reasoning
A structure is 200 ft tall but the aircraft is 600 ft away from it. No applicable waiver is held. Does adding400 ft to the structure height establish the ordinary altitude limit? No. The structure-distance premise is missing; the ordinary400 ft AGL limit remains relevant, subject to every other applicable restriction.
A proposed small UAS takeoff weight, including payload, is 54 lb. Which weight comparison is correct?
- The relevant case condition is: A proposed small UAS takeoff weight, including payload, is 54 lb.
- Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached.
- Therefore choose “It is below 55 lb”. The alternatives must be tested against that same stated condition; an unrelated document, unit or approval cannot supply a missing requirement.
Compare the other answer choices
The proposed choice “It equals the 55 lb boundary” does not follow from the given conditions. Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached.
The proposed choice “It exceeds55 lb” does not follow from the given conditions. Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached.
The proposed choice “Only empty weight counts” does not follow from the given conditions. Small unmanned aircraft under Part 107 weigh less than 55 lb at takeoff, including everything onboard or attached.
Try it, then explain it.
Complete a short set without looking at the example. After each answer, explain which evidence or rule supports your decision and why the alternatives do not fit.
Sources & authorship
Original Slope explanations and examples. References support the concepts; they are not the source of copied questions. Independent educator review is pending.
Faa Ac107 2A