PA.X.D.K1FAA-S-ACS-6C · Nov 2023Knowledge
Instrument approach procedures with one engine inoperative.
Instrument approach procedures with one engine inoperative.
Bottom line
In OEI flight, no instrument directly tells the pilot that the airplane is being flown at zero sideslip. Aircraft Flight Manual/Pilot’s Operating Handbook (AFM/POH) performance figures for OEI flight were determined at zero sideslip, although that fact may not be expressly stated in the manual or handbook.
Key numbers
| Number | What it means |
|---|---|
| about one-half of its diameter from center toward the operating engine at Vyse | Ball displacement |
| five to 10 degrees of bank to initially assist the rudder as the pitch attitude for Vyse is established | Initial failure bank |
| 5-degree bank during the Vmc demonstration, required for the practical test for a multiengine class rating | Vmc demo bank |
FAA references
- FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
- IFH ch. 10 (p. 10-22) — FAA-H-8083-15B
- PHAK Glossary (p. G-16) — FAA-H-8083-25C (2023)
- 14 CFR 91.611 (Authorization for ferry flight with one engine inoperative.) — eCFR current as of 2026-03-05
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