Technical Interview - Type specific questions Flashcards
What are the dimensions of the wing?
Span: 93’6”
Height: 25’5”
Length: 96’5”
Min turning circle diameter: 112’ based on 80 degree nose wheel deflec
Describe the G550 engine
BMW / RR Engine
Model BR-710
Takeoff thrust 15,385 lb/fr
Takeoff thrust to weight ratio is .338
G550 BOW
48,300 lbs empty
Maximum payload?
6,200 lbs at BOW empty 48,300 lbs
Max fuel capacity verses max usable fuel capacity?
Max fuel cap is 41,700 lbs
Max usable fuel capacity is 41,300 lbs or 20,650 in each tank
Flight control gust lock does what?
The gust lock will prevent flight control movement during wind speeds up to 60knots.
If gust lock is engaged, a mechanical interlock within the cockpit pedestal prevents advancing the power levers more than 6 % forward of ground idle.
What does the fuel system comprised of?
Fuel system consists of 2 wing fuel tanks, a series of pumps and lines to supply fuel to the APU and engines, and indicators to monitor the airplane fuel status.
What does the fuel hopper do and where is it located?
The fuel hopper is located at the wing root and is the lowest point of the fuel tank.
Fuel hopper can contain 190 gallons or 1283 lbs.
The fuel hopper also houses a heat exchanger to cool hydraulic fluid.
The right hopper cools the left hydraulic SYS and vice versa.
Describe the hydraulic system on the G550?
The G550 has 2 independent hydraulic systems, L / R, each powered by an engine driven pump installed on the respective Engine that pressurizes fluid in dedicated reservoirs.
These pumps operate as long as the engine are not shut down with the cockpit fire pull handles.
What is unique about the L Hydraulic system?
The fluid from the L side is pressurized by 2 sources other than the engine driven pump.
1 the electric driven AUX Pump
2. The PTU driven by the R hydraulic side
What are the components of the Left Hydraulic system?
Engine driven Hydraulic Pump Aux Pump PTU Fluid lines, Reservoir, Gage's HMG Systems displays
What aircraft systems do the L HYD SYS power?
Landing gear Brakes Nose wheel stearing Flaps Ground and flight spoilers Yaw Damp 1 and Rudder Elevators and ailerons
What is the HMG?
The HMG is a piston motor that uses left hydraulic pressure to rotate a generator shaft at 8,000 rpm to produce AC alternating current.
What is a limit on the ICE Detection system and why?
Automatic anti-icing is not available below 1500 ‘ because full engine capacity is reserved for takeoff and landing.
It is not available above 35,000’ since moisture content is low, and it will dedicate all energy to pressurization of aircraft. If you want it then you must manually turn it on.
What are the primary flight controls of the G550?
Elevator for pitch
Rudder for yaw
Aileron for roll
What are the secondary flight controls for the G550?
Wing flaps… to enhance lift
Flight and Ground Spoilers…to reduce wing lift and add overall drag
Movable Horizontal Stabilizer…aligns the elevator with a/c AOA.
Yaw Damper…uses the autopilot rudder servo to moderate a/c heading oscillation.
What safety features does the flight controls system include?
Stick shaker warning
Stick pusher stall prevention actuator.
Gust Lock
Describe the Fire Protection in General
Fire protection system has sensors to detect excess heat levels associated with fire in the APU, a/c interior, and smoke detectors.
What sub-sections are there in the fire protection system?
Engine and APU Fire and Overheat Detection and Warning
Engine and APU Fire Extinguishers
Aircraft interior Overheat and smoke detectors, Smoke evacuation and portable and Fixed Fire Extinguishers.
Describe the primary AC Electrical Power System
It has 3 IDGs, one on each engine high speed fan, and one on the APU.
Produces 3 phase 115/200V AC at 400 HZ
What are the IDGs rated at?
Rated at 40 Kva
What happens if no AC power can be generated?
An emergency inverter powered by DC from the aircraft batteries thru the L and R ESS DC bus can supply single phase to operate equipment on the ESS AC Bus.
Describe the DC Electrical Power System?
Direct current is obtained by transforming and rectifying aircraft AC power into DC power.
5 TRUs powered by the a/c AC Buses will produce DC power at 28 volts
What happens if all AC power on the a/c is lost?
The TRUs will be inoperative and DC power for essential flight functions is provided by he 2 a/c batteries.
What battery does the G 550 have?
NICAD batteries rated at 53 amps / hour and supply 24 volts of DC power.
The aircraft batteries are normally used for starting the APU or for powering the ground service bus.
Describe the G550 wing?
The wings are swept back 27 degrees and are cantilevered with a 3 degree dihedral.
