Commercial Certification (FAA)
25.111
Takeoff Path
OEI Climb Gradient
See AC 25-7A Section 25.111 b
High Altitude Installed Thrust Characteristics/Lapse Rate Take-offs & Thrust After 8 Seconds
1. Departure from runway
Inhabited Aircraft Only
High
1. Loss of directional control 2. Inadequate runway length
1. Engine cuts to idle
2.Minimum control speed evaluation (Vmca/Vmcg) completed prior to start of testing
3. Brief obstruction and escape route for airfield
4. Brief engine out safe speeds and techniques
5. Performance information to be available for all configurations
6. Verify adequate runway length for each take-off, particularly in the event of an actual engine failure
7. Power reduction speeds to be always greater than Vmcg
8. Perform tests in order of decreasing performance capability
9. Carry out test configuration build-up test point prior to performing any other test points in this procedure
10. Crew to wear protective gear and helmets.
11. All vehicles to be positioned at least 400 feet from runway centerline
12. Identify a suitable takeoff alternate airfield
13. Ensure adequate fuel to divert to alternate airfield prior to beginning tests.
