B777 Systems Flashcards
(139 cards)
CABIN PRESSURIZATION
- Max Differential Pressure
- Max Allowable Cabin Pressure
Differential for T/O and Landing:
- Max Differential Pressure (relief valve) 9.1 PSI
- Max Allowable Cabin Pressure
Differential for T/O and Landing: 0.11 PSI
The main aft axle steering automatically operates
The main aft axle steering automatically operates when the nose wheel steering exceeds 13 deg
Nose gear isolation valve will open when slowing below
Nose gear isolation valve will open when slowing below 60 kts when rudder effectiveness is lost.
Nose wheel and main gear aft axle steering powered by the ___ hydraulic systems.
Nose wheel and main gear aft axle steering powered by the Center / Reserve hydraulic systems.
Alternate landing gear extension uses
Alternate landing gear extension uses a dedicated DC powered electric hydraulic pump.
ENGINES:
(200ER):
(300ER):
(200ER): RR Trent 892, 90,000 lbs
(300ER): GE 90-115BL 115,000 lbs
ENGINE AUTO STARTS:
- Does not monitor
- Abort start if
- Does not monitor oil pressure or oil temperature
- Abort start if no oil pressure when EGT rises
ENGINE AUTO STARTS: restart attempts
- (200ER) One auto restart attempt
- (300ER) Two auto restart attempts
- (Uses both ignitors on second start attempt)
- (300ER) Third attempt adjusts starting fuel flow
Back-up source of electrical power for the engine ignitors
Back-up source of electrical power for the engine ignitors is provided by the STANDBY AC bus.
ENGINE AUTO START ABORTS:
- Starter Shaft Failure - Compressor Stall
- Air Insufficiency
- Hung Start
- No N1 Rotation
- Hot Start
- Duty Cycle Exceeded / Starter
- No rise in EGT
NO ENGINE AUTO START RE-STARTS ON THE GROUND IF:
- Starter Shaft Failure
- Air insufficiency (approx. 25 psi min)
- No N1 Rotation
- Duty Cycle Exceeded on Starter (6 ½ minutes continuous, 7 minutes scheduled)
- (200ER) The start is aborted above starter cutout speed.
- (300ER) EGT exceeds the start limit line
ENGINE AUTO RELIGHT:
- Activates when
- Auto Relight is reenergized
- Attempts continuous restarts until
- Engine ignition is automatically controlled by
- If below ___ N3, EEC shuts down fuel and ignition and disables the auto relight function.
ENGINE AUTO RELIGHT:
- Activates when engine is below idle with the fuel control switch in RUN
- Auto Relight is reenergized if fuel control switch is cycled to cutoff and back to run.
- Provides flameout protection during rain / hail ingest.
- Attempts continuous restarts until engine recovers or goes below 35% N3.
- Engine ignition is automatically controlled by the EEC Auto Relight system.
- If below 35% N3, EEC shuts down fuel and ignition and disables the auto relight function.
- Below 35% N3 – FUEL and IGNITION - OFF
All takeoff and go-around thrust ratings are limited to
5 minute duration.
During T/O – G/A: amber band exceedance indications are inhibited
5 minutes after EGT enters the amber band)
After landing: let engine stabilize at idle prior to shutdown for
(200ER): 1 minute, (300ER): 3 minutes.
ENGINE BLEED VALVE CLOSES AUTOMATICALLY: S O B G O L F
Start Overtemp Bleed Source is lost Ground cart supplying bleed air Over pressure Leak (Bleed) Fire switch pulled
Do not use aileron trim when
the autopilot is engaged.
ENGINE OUT RUDDER TRIM:
- Try to match ___ to rudder trim units.
fuel flow rate
FIRE TEST (10 lights):
- 2 Master Warnings
- 2 Bottle Discharge Lights
- 2 Fire Switches
- 2 Fuel Control Switches
- 1 APU Handle
- 1 EICAS: Fire test in PROG / PASS / FAIL
ENGINE FIRE WARNING INDICATIONS:
- 2 Master Warning Lights
- 1 EICAS Warning
- 1 Fuel Control Light
- 1 Fire Switch Light (switch unlocks)
- 1 Fire Bell (cockpit)
- 1 Horn while on the ground (wheel well)
ENGINE FIRE SWITCH: (AF HEAT)
- A
- F
- H
- E
- A
- T
- Arms the fire bottles
- Fuel valves (spar and engine) closed
- Hydraulic pump depresses, shuts fluid off
- Electric generator field trips
- Air valve closes (bleed air)
- Thrust reverser isolation valve closed
- Discharge the second fire bottle after 30 seconds if the fire is still not out.
TAC (Trust Asymmetry Compensation) NOT Available: (AF BEST) - A - F - B - E - S - T
- Anytime less than 10% N1 difference between engines
- Flight Controls in Secondary / Direct mode
- Below 70 kts
- Engine thrust data is lost
- System failure
- Thrust reversers applied
EEC MODES: (200ER)
- Normal: (EPR) Thrust Overboost Protection
- Soft Alternate: (N1) NO Thrust Overboost Protec.
(Selected automatically, does not provide Thrust Reference lines, reverse thrust above N1 indicator) - Hard Alternate: (N1) NO Thrust Overboost Protec.
(Selected manually, does provide N1 Command and Thrust Reference lines)
(all 3 modes have N1, N2 + N3 Overspeed Protect.)
APPROACH IDLE SELECTED BY EEC WHEN:
- Engine Anti-ice is on
- Flaps are commanded Flaps 25 or greater
- One Hydraulic (C1 or C2) air pump inoperative & flaps not up
- Opposite engine bleed–air valve closed (single engine operations)