Max Differences

Question 1

Bleed system

Answer 1

Electronically controlled and pneumatically actuated
Bleed air comes from the 4th and 10th stages
Single engine bleed source can operate both packs in flight
Automatically detects and isolates faults
RAM DOOR FULL OPEN removed
BLEED replaces BLEED TRIP OFF

Question 2

BLEED light will illuminate when

Answer 2

An engine bleed over pressure or temperature

A bleed system fault

Incorrect bleed configuration after takeoff or go around. (Both switches in OFF 45 secs after flaps have been retracted)

Question 3

PACK light will illuminate when

Answer 3

Pack control failure or overheat

Pack control valve fails In the closed position

Both pack lights will illuminate if the switches are OFF 45 secs after the flaps have been retraced

Question 4

EQUIP COOLING Differences

Answer 4

EQUIP SMOKE - illuminates if smoke is detected in the equipment cooling system

OFF - Lights relocated to above the switches

Question 5

Anti ice differences

Answer 5

Core anti ice - EECs automatically control the core anti ice by directing bleed air to the engine core as required. There is no flight crew input or indication

ENG ANTI ICE alert

L/R VALVE and COWL VALVE - Lights now amber to indicate valve is in transit and extinguish when valve agrees with switch position (master caution illuminates 6 secs if position disagreement)

WING ANTI ICE lights do not illuminate during takeoff roll

Question 6

ENG ANTI ICE alert illuminates when

Answer 6

Core anti ice system is inoperative

Cowl thermal anti ice system is inoperative or will not function if selected

Question 7

APU control panel differences

Answer 7

No EGT gauge

No blue MAINT light

DOOR - Max apu has 3 door positions (Ground open, Flight open, Closed). DOOR light illuminates when it is not in the commanded position.

Question 8

Engine start differences

Answer 8

BRM - Bowed rotor motoring, designed to straighten the rotor shaft which will naturally now due to thermal buildup after engine shutdown.

EEC will initially maintain an N2 between 18-24% for anytime between 6-90sec. MOTORING indication will be seen while BRM is active. - Only active for engine starts in the ground

Each start attempt is limited to 3 mins. 5 mins for extended engine motoring

5 mins required inbetween 1st and 2nd start attempt. 10 mins for 3 start attempts or more.

Recommended warm up time for LEAP1B = 3mins

Question 9

EEC differences

Answer 9

2 new auto shut down functions

EOS - Electronic Overspeed, if an overspeed condition is detected the engine will shut down

TCMA - Thrust Control Malfunction Accommodation, if the thrust levers are reduced to idle on the ground and an engine does not respond the engine will be shut down.

Both will indicated by ENG FAIL indication on PFD

Icing idle - New additional idle which is the highest idle setting and is selected by the EECs in flight if engine anti ice is selected ON and both the flaps and gear are up. Not available above 30,400ft

Question 10

Static engine run up in icing conditions differences

Answer 10

Increase thrust on each engine to a min 50% N1
Decrease thrust to idle
Repeat every 60mins

Before takeoff - Set 50% for a min 5secs and confirm stable engine before setting takeoff thrust

Question 11

Engine alert differences

Answer 11

THRUST - Compares actual thrust to commanded thrust, blinks for 10 secs then remains illuminated (inhibited during takeoff, landing and go around). Thrust arc on N1 gauge.

FUEL FLOW

Question 12

Reverser indications

Answer 12

REVERSER COMMAND - Reverser commanded in flight

REVERSER AIR/GND - Reveser air gnd protection lost

REVERSER LIMITED - Reverse thrust not available or is limited to reverse idle on the effected engine

Question 13

Spoiler differences

Answer 13

New fly by wire spoiler system which includes

Manoeuvre load alleviation (MLA)
Landing attitude modifier (LAM)
Emergency descent speed brakes (EDS)
Elevator jam landing assist
Speed brake logic changes

Question 14

Manoeuvre Load Alleviation

Answer 14

Decreases structural loads when speed brakes are extended at higher gross weights

Commanded through the spoilers control electronics unit

Functions with load factors greater than 1.3G or less than 0.3G

Question 15

Landing attitude modifier

Answer 15

Deploys speed brakes at F30/40 to
Increase pitch angle
Maintain nose landing gear contact margins like the NG
Begins at VREF +10
Max deflection at VREF +20

At F15-30 it deploys speed brakes to generate additional drag to capture and maintain the glidepath like an NG

Question 16

SPEED TRIM FAIL illuminates when

Answer 16

Failure of the speed trim system like the ng

Or

Failure of the MCAS system

If one system fails they both fail for the rest of the flight

If AoA vanes differ by more than 5.5 degrees with the flaps up, SPEED TRIM FAIL will illuminate

Question 17

SPOILERS light will illuminate when

Answer 17

One or more spoiler pairs are inop

Question 18

AFDS changes

Answer 18

Auto disengagement of the autopilot following stick shaker activation
Temporary removal of flight director bars and AFDS pitch mode transition following stick shaker activation
Inhibit of autopilot nose up trim when airspeed is within the min manoeuvre speed (amber bar)

Question 19

Fuel system differences

Answer 19

FILTER BYPASS - Both lights will illuminate if there is an impending filter bypass

FUEL USED - New page added to progress pages. Has a calculated function which takes the fuel from startup and updates with actual ff data.

FUEL DISAGREE - Appears below fuel gauge and on CDU scratch pad. New NNC for this. Difference between FMC calculated and totaliser fuel has exceeded a pre determined Iimit

FUEL FLOW - Actual fuel flow compared to expected fuel flow exceeds a pre determined limit for 5 continuous mins

USING RSV FUEL/INSUFFICIENT FUEL - Now also shown on the engine display and the FMC and have new NNC

Question 20

Flap 40 limitation

Answer 20

171kt

Question 21

Landing gear differences

Answer 21

Just UP or Down

Lever electrically controls the hydraulic extend and retract system
No mechanical connections
Pressure automatically removed 10secs after all gear up and locked

Do not move the gear after the gear is moved to up - may accidentally extend the gear