FAA Airline Transport Pilot (ATM)Regulations (14 CFR 117/121/61)Hard
A Part 121 turbojet flight is planned to land at a destination airport with 8,000 feet of usable runway, standard temperature and no wind. Under 14 CFR 121.195(b), what is the maximum landing distance the dispatcher may plan for at the planned landing weight?
- A6,000 feet
- B4,000 feet
- C4,800 feet
- D7,200 feet
Show answer & explanationAnswer & explanation
Correct answer: C. 4,800 feet
14 CFR 121.195(b) requires that a turbojet airplane be able to land within 60% of the effective runway length at the destination, based on standard temperature, still air, and planned landing weight. 8,000 ft × 0.60 = 4,800 feet, so the planned landing distance may not exceed 4,800 feet.
Why the other options are wrong
- A. 6,000 feet reflects a 75% factor, which is too high for turbojets.
- B. 4,000 feet reflects a 50% factor, which is not the standard used.
- D. 7,200 feet reflects a 90% factor, far exceeding the allowed margin.
Turbojet Landing Distance (121.195(b))
A turbojet airplane's planned landing distance at the destination may not exceed 60% of the effective runway length, at standard conditions and planned landing weight.
- 60% factor applies to turbojets under 121.195(b)
- Based on standard temperature and still air
- Runway length × 0.60 = max allowable landing distance
Memory trick: 'Sixty percent, don't relent' — turbojets only use 60% of the runway on paper.