Engine Failure Above V1
Gulfstream G450 Abnormals
You maintain directional control, rotate, climb at the appropriate speed, and retract the landing gear as you would during any other takeoff. The aircraft is certified under 14 CFR 25 so that you should not have to do anything else until 400' AGL. The G450 AFM takes this one step further and gives you until 1,500' AGL before getting to the flaps and the rest of the checklist.
You might one or more CAS messages, fire light, noise, vibration, or other indication telling you the engine has failed.
Engine Exceedance, L-R
Engine Fail, L-R
Engine Fire, L-R
Engine Fire Loop Alert, L-R
Engine Hot, L-R
Oil Pressure Low, L-R
Oil Temperature High, L-R
Oil Temperature Low, L-R
Thrust Reverser Unlock, L-R
This checklist is designed to tackle any engine failure after V1, including a failure en route or on approach. There are times, however, when other checklists are called for. Engine fires are handled in the QRH section EC. If you don't have an engine fire, it would be useful to scan the table of contents of section EB to consider things like engine out drift down, airstart, engine exceedance, high oil temperature, low oil pressure, thrust reverser malfunctions, engine vibration, FADEC alternate control, and other issues.
[G450 Airplane Flight Manual, §4-06-30]
- Directional Control . . . MAINTAIN
- VR Speed . . . ROTATE
- V2 Speed . . . ATTAIN AFTER LIFTOFF
- Landing Gear . . . UP AFTER POSITIVE RATE OF CLIMB ESTABLISHED
- Flaps . . . UP AFTER V2 + 10 ATTAINED AT 1,500 FT ABOVE AIRPORT LEVEL
- Airspeed . . . CONTINUE ACCELERATION TO VSE
- Operating Engine Power Lever . . . MCT POWER
- Failed Engine Power Lever . . . IDLE
- Failed Engine FUEL CONTROL Switch . . . OFF
- Failed ENG GEN . . . OFF
- Failed ENG BLEED AIR . . . OFF
- ISOLATION Valve . . . OPEN
- PWR XFR UNIT (If Left Engine Failed) . . . ON (IF REQUIRED)
- AUX Pump (If Left Engine Failed) . . . ARM
- Fuel Load Balance . . . MONITOR / MAINTAIN
- FGC Selection . . . AS REQUIRED
- TCAS . . . TA ONLY
- If there is no apparent reason for the engine failure / flameout consider restarting the engine. See Airstart – Windmilling, page EB-17.
- Single Engine Autothrottle . . . OFF
- AUX Pump . . . SELECTED ON
- Landing Gear . . . DOWN / 3 GREEN
- Airspeed. . . VREF for 20° FLAPS + 10 KCAS
- Ground Spoilers . . . ARMED
- Flaps . . . 39°
- Airspeed . . . VREF for 39° FLAPS + 5 KCAS
- Operating Engine Thrust Reverser . . . AS REQUIRED
NOTE: Additional rudder input will be required when nose wheel lifts off.
NOTE: If engine failure should occur after passing V2 on takeoff, it is recommended that the speed at the time of engine failure (up to V2 + 10 knots) be maintained. A speed of V2 + 10 knots in single-engine takeoff configuration will produce the maximum climb gradient available.
CONTINUE CLIMB AT V2 TO 1500 FEET ABOVE AIRPORT LEVEL, ACCELERATE TO V2+10, THEN:
For an obstacle above 1500 feet AAL or a SID that requires a climb to more than 1500 feet AAL, continue climbing at V2 speed with flaps in the takeoff position until the obstacle is cleared or the SID altitude requirement has been satisfied.
NOTE: If flaps do not retract normally, manually select PTU and AUX pumps ON.
NOTE: Takeoff power may be maintained for ten (10) minutes during single-engine operations as needed. Power should then be reduced to Maximum Continuous Thrust (MCT).
NOTE: The flight crew shall agree on the correct (failed) fuel control prior to placing it in the OFF position.
Match FGC to operating engine: FGC 1 = Left Engine; FGC 2 = Right Engine.
Note: The APU may be used as an alternate source of electrical power, if desired. See APU Inflight Operation - Alternate Electrical Power Source, page EA-20.
See Fuel Load Balancing, page EE-23.
One Engine Inoperative Landing Procedure:
For approach and landing, operation of landing gear, flaps, spoilers, thrust reverser and brakes should be accomplished as separate events, not simultaneously:
At Final Approach Fix:
If the crew elects to land at flaps 20°, fly the approach at VREF for flaps 20° + 10 knots. Minimum VAPP for 20° flaps is 125 KCAS.
Note: If strong winds are present, add VREF ½ of the steady state wind plus the full gust to a maximum additive of 20 knots.
Stick and Rudder
An engine failure on takeoff should not be too difficult but you should prioritize keeping the airplane right-side-up and climbing. You will need less rudder than you think when on the runway in a three-point attitude, you will need all the rudder you've got once you rotate.
More about this: G450 Engine Fire/Failure on Takeoff.
The autopilot is approved for use during a single engine approach, but not for missed approach. The autothrottles are not approved for single engine approach.
Gulfstream G450 Airplane Flight Manual, Revision 36, December 5, 2013