PA.IX.B.K3FAA-S-ACS-6C · Nov 2023Knowledge
Effects of atmospheric conditions on emergency approach and landing.
Effects of atmospheric conditions on emergency approach and landing.
Bottom line
High density altitude is a “V” hazard that affects takeoffs, climbs, and landings. Various surface features and atmospheric conditions encountered in landing can create illusions of being on the wrong approach path. A constant gliding speed is usually maintained because variations of gliding speed nullify all attempts at accuracy in judgment of gliding distance and the landing spot.
Key numbers
| Number | What it means |
|---|---|
| 10 percent lead (100 feet if descent rate is 1,000 fpm) for a complete power failure | Level-off lead |
| approximately 100 feet above target altitude at 500 fpm descent | Practice glide lead |
| 2 seconds apart along the touchdown zone | Night glow sticks |
FAA references
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
- PHAK ch. 17 (p. 17-12) — FAA-H-8083-25C (2023)
- AFH ch. 9 (pp. 9-28–9-29) — FAA-H-8083-3C
- AFH ch. 3 (pp. 3-23–3-24) — FAA-H-8083-3C
- PHAK ch. 17 (p. 17-10) — FAA-H-8083-25C (2023)
- AFH ch. 9 (p. 9-20) — FAA-H-8083-3C
- SEA ch. 6 (p. 6-8) — FAA-H-8083-23
- SEA ch. 7 (p. 7-8) — FAA-H-8083-23
Build understanding you can use
Unlock the full lesson and continue studying this element.
- Full teaching sections: What it is; Key points; Rules and numbers; How it is done
- Check your understanding with answers you can reveal
- Common mistakes paired with the FAA facts that correct them