ATPL Cheat Sheet 2026

The 30 highest-yield ATPL facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. The aerodynamic center of an airfoil is the point about which the pitching moment coefficient: → Remains approximately constant with changes in angle of attack
2. What is the purpose of a Letter of Authorization (LOA) in US aviation? → To grant specific operational approval beyond standard regulations
3. A TAF forecast covers what standard period in the US? → 24 or 30 hours
4. A pilot receiving the light signal 'Steady Green' from the control tower while airborne should: → Cleared to land
5. Controller-Pilot Data Link Communications (CPDLC) is particularly beneficial for: → Oceanic and remote area operations where HF voice communications are unreliable
6. Time of Useful Consciousness (TUC) at FL350 without supplemental oxygen is approximately: → 30–60 seconds
7. Crew Resource Management (CRM) training primarily aims to reduce accidents caused by: → Communication breakdowns and poor decision-making in the cockpit
8. A stall of an airfoil occurs when: → The critical angle of attack is exceeded
9. The Precision Approach Path Indicator (PAPI) provides visual glide path information using light color combinations. A correct 3° approach is indicated by: → Two red lights on the left and two white lights on the right
10. Adverse yaw in conventional aircraft is caused by: → Differential aileron drag during a roll input
11. Dutch roll is a lateral-directional oscillation that involves coupling of: → Roll and yaw axes
12. Which cloud type is most associated with severe turbulence, icing, and lightning? → Cumulonimbus
13. A missed approach must be initiated no later than: → When the aircraft reaches the MAP with the runway not in sight
14. Thunderstorms are most likely to form in which type of atmospheric condition? → Unstable air with high moisture and a lifting mechanism
15. Clear Air Turbulence (CAT) is most commonly associated with: → Jet streams and wind shear
16. Under ICAO standards, the maximum cabin altitude for pressurized aircraft during normal operations is: → 8,000 ft
17. An Airline Transport Pilot certificate is required to act as pilot-in-command of: → An aircraft in Part 121 air carrier operations
18. Which model best describes a pilot's decision-making under time pressure? → DECIDE model (Detect, Estimate, Choose, Identify, Do, Evaluate)
19. What is the main consideration when determining the Minimum Safe Altitude (MSA) on a given route? → Terrain and obstacle clearance
20. Which FAR defines the minimum equipment list (MEL) authorization for air carriers? → FAR Part 121
21. Under FAR 91.176, which crew position may use Enhanced Flight Vision Systems (EFVS) to descend below DA? → Only the PIC
22. In IFR cruise, the minimum altitude for OROCA (Off-Route Obstacle Clearance Altitude) provides terrain clearance of: → 1,000 ft in non-mountainous, 2,000 ft in mountainous areas
23. Circadian rhythm disruption in long-haul pilots primarily affects: → Alertness, performance, and decision-making quality
24. The critical Mach number is defined as the free-stream Mach number at which: → Sonic airflow first appears somewhere on the aircraft
25. What document serves as the basis for an air carrier's Operations Specifications (Ops Specs)? → FAA approval under Part 119
26. When squawking 7700 on the transponder, the pilot is indicating: → General emergency
27. Which front typically produces the most widespread precipitation and gradual weather deterioration? → Warm front
28. What weather phenomenon is indicated by a rapidly falling altimeter setting? → Approaching storm or low-pressure system
29. The number of entries from the previous Journey Log to be carried forward to become the first entries of a new Journey Log would be; → A sufficient number of relevant entries to ensure some sort of meaningful continuity.
30. Under FAR 91.117, what is the maximum airspeed below 10,000 ft MSL? → 250 knots IAS