Seq. Reference ASTM or CS-LSA Subject of test Test point Number of flights Configuration (see point 7 and 11.) Flight test plan reference 1 F2245-12d 4.7.1, 4.7.2 Ground stability and control tests Checking brakes, taxi to head, tail and crosswind. High-speed taxi with nose up and crosswind conditions – C1, MID CG, MIN WT Ground test plan 2 N/A Engine check Checking the engine with flight conditions (operation with TO for ~5 min, MCP for ~15 min, cruise settings for 20 min.) taxies up to VR, checking engine RPM limits and static power (with dynamometer) After that, a maintenance check should be carried out. See 11.b. – C1, MID CG, MIN WT, I0 Ground test plan Breakpoint – test campaign can be continued, when the aircraft passes all the items above. Consider 11.b. 3 N/A High speed taxi High speed taxi tests up to VR – C1, MID CG, MIN WT, I0 Flight#1 4 N/A First flight Take-off, climb, general handling characteristics 1 C1, MID CG, MIN WT Flight #1 5 N/A Acceleration tests Aircraft’s stability, and yawing/pitching characteristics during accelerating/decelerating, initial effects of power and flight controls 1 C1, MID CG, MIN WT Flight #1 6 N/A Engine cooling & behavior test Engine characteristics within flight 1 C1, MID CG, MIN WT Flight #1 7 F2245-12d 6.11.1, 6.11.2, 8.2.1, 8.2.2 Airspeed indicator, Altitude indicator and AOA indicator initial calibration flights Flying at altitude 6000’ with the reference airspeed system 4–5 C2, MID CG, MIN WT, I1, I7 Flight#2 8 N/A General flight control characteristics Longitudinal, lateral, directional control characteristics. Sideslips for assessing static directional and lateral stability characteristics. Trimmability 7 C2, MID CG, MIN WT Flight#2
After the risk management, the situation is the following: – The aircraft still could enter into an inadvertent and unrecoverable spin. The possibility remains 3 – The risk for the flight crew is lower, because they have chance to save their lives (wearing parachutes, abandoning the aircraft is easier with the jettisonable canopy), therefore the only outcome of a spin accident would be the loss of the aircraft (the flights were planned in uninhabited areas – see point 11 – therefore the only endangered people are the crew on board). The severity will be D (loss of the aircraft, injuries during bailout – applying emergency procedures) – The overall risk decreases to 3D, which is yellow-coloured. It will be acceptable after the review of the operations Risk Management Hazard Cause Effect Probability Severity Risk Mitigation Emerg. Proc. Risk The aircraft enters spin during stall test The unknown flight above Crash, and fatal injuries to the flight crew 3; Improbable, but may occur A; Destruction of equipment, fatalities 3A Parachute wearing; Minimal safe altitude to 6000’ AGL; Canopy jettison system installation If the spin is before 1500’ the aircraft must be abandoned. 3D Table app. 2 – Example of use of risk mitigation table Probability of occurrence Severity of occurrence Catastrophic Hazardous Major Minor Negligible A B C D E 5 Frequent 5A 5B 5C 5D 5E 4 Probable 4A 4B 4C 4D 4E 3 Occasional 3A 3B 3C 3D 3E 2 Remote 2A 2B 2C 2D 2E 1 Improbable 1A 1B 1C 1D 1E Table app. 3 – Risk classification table Legend of risk (and colouring): Avoid Unacceptable; High Handling of risk demands decision;
ALT: 4000’ (QFE) Speed range: VS1-100 KTS Trim: straight and level flight Overall risk: 2B; after mitigation: 2C Safety equipment: personal parachutes, crash axe in the baggage bay. VS0: 44 KT VS1: 50 KT VFE: 90 KT VMAX: 100 KT RPM: 2550 MP: 30 HgIn Limit Steps Time Comment Limit Steps Time Comment VFE 90 KT VS1: 50 KT 1. Extend takeoff flaps 2. Trim the aircraft to 59 KT with full power (TOGA) 3. Establish a coordinated turn with 30° bank angle to the left 4. Start timing 5. Reverse to 30° turn in the opposite direction 6. Record time of 60° bank change achievement 7. Repeat step 3-6 for both directions VFE: 90 KT VS0: 44 KT 8. After step 7 was done, set altitude to 4000 feet 9. Set idle power 10. Extend landing flaps (below VFE) 11. Trim the aircraft to 50 KT 12. Establish a coordinated turn with 30° bank angle to the left 13. Start timing 14. Reverse to 30° turn in the opposite direction 15. Record time of 60° bank change achievement 16. Repeat step 12-15 for both directions Test data report