Systems Flashcards
When will the Emer exit lights illuminate if armed?
DC Bus #1 fails or AC power is turned off
When will fasten belts light automatically illuminate?
With AUTO selected, by reference to the LDG and Flap positions:
- ON when Flaps or Gear are extended
- Off when flaps and gear are retracted
When is the pax o2 system activated automatically?
Cabin Alt of 14,000’ (14, 650 for Tails 550WN and 551WN)
how long will the pax o2 system provide o2?
Approximately 12 minutes. Pulling 1 mask activates all 4 and cannot be shut off
How can a locked flight deck door be accessed from the pax cabin?
Emer access code, after expiration of the time delay. Continuous unlock chime and AUTO UNLK light flashes.
How can teh flight deck be alerted in the event of an attendant handset failure?
By pressing 1 then ENT keys on the emergency access panel, the flight deck chime will sound.
-800/8 Max: what does ZONE TEMP light indicate?
Illuminated (without recall)
- CONT CAB indicates a duct overheat or failure of pri & STBY control
- FWD or AFT CAB indicates duct overheat
Recall:
- CONT CAB = fail of flight deck pri or STBY temp control
- FWD or AFT CAB = fail of associated zone control
- Lights will extinguish when MC is reset
What additional functionality does a MAX BLEED light provide compared to the NG?
An incorrect bleed air configuration after takeoff or go-around (45” after flap retraction)
- Turning either BLEED sw ON extinguishes both BLEED lights if lights illuminated for config error
What could the illumination of both PACK lights in a MAX indicate?
An incorrect pack config after t/o or G-A (45” after flap retraction)
- Turning either pack ON extinguishes both if caused by config error
- A 10-minute time-out is associated that will extinguish the bleed lights even if config is not changed before that time elapses
What does illumination of the Cabin Pressurization Panel AUTO FAIL light indicate?
Amber: Auto pressurization system failure detected:
- Indicates a single controller failure when ALTN light is also illuminated
- Indicates dual controller failure when illuminated alone
With illumination of auto fail light, system auto transfers to the ALTN. Moving switch to ALTN will extinguish the AUTO FAIL light, however the ALTN light remains illuminated
What is risk with a DUAL BLEED light?
APU and 1 or more engine bleeds are open, which could allow for a back pressure of the APU. Thrust must be limited to IDLE with a DUAL BLEED
How can cabin alt be controlled manually?
Man Control on the panel, then open/close the outflow valve. Monitor cabin altitude panel and valve position indicator.
How can maximum airflow for ventilation be provided when APU is only source?
Force “APU high airflow” by placing either or both pack switches to HIGH.
What caution light illuminates if the aircraft begins to descend without reaching the preset cruise altitude?
OFF SCHED DESCENT. Controller automatically programs field elevation of departure airport.
How can the operation of the window heat be verified if a Window Heat switch is turned on and the green Window Heat ON light does NOT illuminate?
Window Heat Test switch to PWR TEST (“Confidence Test”)
When will the Probe Heat automatically turn on with the switch in auto?
When either engine is running
Difference between NG and MAX Engine A/I ops?
NG: Individual control, per engine, for Cowl Heat only. Illuminate = pressure problem
MAX: Individual control of cowl heat but core heat automatically functions in the engine via the EECs.
NG and MAX both have COWL ANTI-ICE lights. What do they indicate?
Overpressure condition in the duct downstream of the engine A/I valve
MAX has ENG ANTI-ICE and COWL VALVE lights. What do they indicate?
A/I: cowl TAI inhibited due to system failure or when an engine core A/I valve fails closed
Cowl Valve:
- Momentary: valve in transit
- Steady: valve position disagrees with the related switch position
What do the Wing A/I valves and switches do if the wing A/I switch is on during T/O?
Both valves close if either TL is above T/O warning or either temp sensor senses duct overheat.
Wing A/I automatically trips OFF when Air/Ground sensor goes to air mode.
What does positioning the Wing A/I switch to ON in-flight do to the stall warning logic?
Activates stall warning for icing conditions.
1. Adjusts stick shaker and min maneuver bars. FMC VREF is NOT adjusted automatically.
2. Stall logic remains in icing mode for remainder of flight, regardless of switch position.
At what altitude does the MCP IAS/MACH display auto switch from IAS to Mach?
~FL 260
What are the criteria to arm VNAV on the ground?
- Route loaded
- Valid PWB
- Both FD’s on
VNAV guidance activates at 400’ AGL
What does selecting ATL INTV do if at VNAV cruise?
- If MCP alt is above FMC cruise, resets cruise alt to MCP and initiates cruise climb
- If MCP is lower (but at or > any constraint), a CRZ DES occurs if the acft is >50nm from TOD. The result is cruise alt reset to the MCP ALT and VS commands 1,000 fpm to new cruise.
— If < 50nm from TOD, Early Descent mode is invoked - If > 50nm to TOD and MCP alt below current alt AND a descent constraint, enters Early Descent VS of 1,000fpm until path intercept or MCP ALT level-off occurs
What does TOGA AFCS command when engaged for takeoff?
Pitch in the following order:
- 10 degrees ND until 60 KIAS
- 15 degrees NU after 60 KIAS
- 15 degrees NU after lift-off until sufficient climb rate is acquired, then commanded to maintain MCP speed plus 20 KTS
What does the AFDS pitch command* if an engine failure occurs (1) at, (2) after lift-off? (* Think speed)
- At (on ground): targets V2 or airspeed at lift-off, whichever is greater
- After:
— V2 if A/S < V2
— Existing speed, if between V2 and V2+20
— V2 + 20 if A/S is > V2+20
What guidance does the GA mode of the AFDS provide?
- 1st push: thrust for 1-2,000 fpm climb. A/T mode of “GA” on FMA
- A/P disengages
- Pitch is TOGA and pitch mode of “TO/GA” on FMA
- F/D pitch commands 15 degrees NU until reaching programmed rate of climb, then target A/S for each flap setting based on max t/o weight calculations
- Roll holds current ground track (“Roll Mode” FMA) at or < 50’ AGL. >50’ AGL = LNAV engages.
- IAS/Mach display blanks
- Commanded A/S cursor auto moves to target airspeed for existing flap base on max TOW
What do the FD and A/P do if windshear is encountered during an ILS approach?
Attempt to hold the acft on altitude or on G/S (if captured), without regard to AOA or stick shaker limits. A/S could decrease < shaker and into a stall if pilot does not intervene by pushing TOGA or disconnecting the A/P & flying manually
How can the CVR be erased?
Push the erase switch (red) for 2”. All 4 channels are erased. Only works on ground with parking brake set
If the VHF radio has the Alt Mode selected, what radios are available for Xmit and Rec at the degraded station?
- Capt: VHF 1
- FO: VHF 2
- Observer: VHF 1
The speaker and speaker switch are inop at that station and flight interphone/service interphone cannot be used.
How can WiFi be limited to Crew Only?
Push the button to cycle to CREW ONLY (green) or
Broadband System Switch: Crew Only
Why does the QRH direct the gen drive DISCONNECT switch to be placed in the Disconnect position?
Prevents generator drive damage
What could cause the DRIVE light to illuminate?
- IDG Failure
- IDG auto disconnect due to high oil temp
- IDG disconnect through IDG Disconnect switch
- Engine shutdown
How is the transfer bus powered if the respective IDG is disconnected?
With the Transfer bus switch in AUTO = automatically transfers through the bus tie breaker
How does load shedding function for a single generator operation?
System is designed to auto-shed electrical load incrementally based on actual load sensing.
What does a TR UNIT light indicate?
Ground: any 1 TR has failed
Air: Either TR 1 failed or both TR 2 & 3 failed
Why does the QRH prohibit the use of the AFDS approach mode? (Think electrical system)
At G/S capture, the cross bus tie relay automatically opens, isolating DC bus 2 to prevent a single failure from affecting both navigation receivers and FCCs
What does the STANDBY PWR OFF light indicate?
1 or more of the following are unpowered:
- AC or DC standby bus
- Batt bus
What does a SOURCE OFF light indicate?
No manually selected source or the manually selected source has been disconnected.
(Note: If a source has been selected to power the opposite transfer bus, both transfer busses are powered.)
Can the APU gen supply power to both AC transfer buses in flight?
Yes
How much time will a fully charged batter provide standby power?
- 2 batteries ~60 min
- 1 battery ~30 min
What is the normal batt voltage if checked on the DC metering panel?
22-30V
How is standby power provided if all engine and APU electrical power is lost?
With STBY SW in AUTO, loss of all A/C electrical power causes the batteries to power the standby loads (air and ground). AC STBY bus is powered from the batteries via static inverter. DC Standby Bus, Batt Bus, Hot Bat Bus, and Switched Hot Bat Bus are powered directly from the battery(ies)
What flight instruments are available if the battery is the only source of electrical power?
Capt’s:
- inboard display with navigation display
- outboard display with PFD
Clocks
Left EFIS Control Panel
- Some 700: integrated standby flight instrument display, standby mag compass
- Some 700, All 800: RMI, standby airspeed/altimeter, SAI, standby mag compass
How does the EEC indicate an impending hot start?
White blinking EEC senses condition that may lead to hot start or stall during ground. Current versions of EEC software will automatically cut fuel for an impending hot start or stall on ground.
What is indicated if the oil quantity is displayed in reverse video accompanied by “LO”?
Low oil quantity.
- Note: oil qty may decrease significantly during STTO. If this occurs, engine operation is not impacted and the correct oil qty should be indicated during level flight.
- Note: oil qty as low as zero is normal if windmilling N2 RPM is <~8%
What structural limit protection does the EEC provide?
N1 and N2 redline over speed in both norm and alt. Does NOT provide overtemp protection
What do icing idle and approach idle provide in a MAX?
Icing idle is required to meet the bleed demand of the TAI. Approach idle improves acceleration time in the event of a G-A. When in icing mode, EEC begins to transition from min flight idle at 30,400’ and increases idle to provide full icing idle at or below 22,000’. Approach idle is w/flaps 15 or greater, or any time they’re not up and TAI is on.
What happens if the oil filter becomes saturated w/contaminants?
Oil automatically bypasses the filter. Prior to that, OIL FILTER BYPASS alert illuminates on upper display unit
