757 Differences Flashcards
Maximum operating altitude
42,000 feet
Max takeoff weight
Max landing weight
250,000 pounds
210,000 pounds
Maximum takeoff and landing tailwind component
10 knots
Center tank fuel limitation
Maximum of 2000 Lbs. (907 Kgs) with less than full wing tanks and cannot exceed maximum zero fuel weight
What category is the 757 for instrument approaches ?
It can be CAT B or C
If the airplane is empty it can be CAT B
CAT B 91-121 knots
CAT C 121-141 knots
What parts of the wing have anti ice ?
On the 757, the 3 Leading Edge Slats Outboard of the respective Engine are heated.
What is the rich position on the fuel control switch for ?
This position is used for fuel enrichment during cold engine starts, when the EGT temperature indicates 0 degrees or less. After engine start, the pilots place the switch to run. Once the engine reaches idle, fuel flow is unaffected by switch position. RICH adds 100 PPH fuel flow for start
What is the purpose of the engine limiter switches ?
The purpose of the engine limiters is to prevent N1, or fan overspeed.
When selecting Climb 2 on the TMSP panel on the ground when do we select Climb 1 and then CLB on the climb out ?
Takeoff weight less than 210,000lbs initial CLB2 stepping to CLB1 at climb less than 1000ft/min then stepping to CLB as less than 1000ft/min
During engine start what do you want to see on the engine page before going to RUN on the fuel control switch ?
EGT below 100 Celsius
N2 10%
N3 25%
If there is a APU fire what will the fire protection do ?
On the 757, for the APU fire bottle to discharge automatically, the airplane must be on the ground with both engines off
How many ailerons does the 757 and do they have a aileron lockout function ?
2 ailerons total and no aileron lockout function
How does the Autoslat Protection feature work ?
The Slats will AUTOMATICALLY extend from the Takeoff position to the fully extended Landing position.
The slats retract a few seconds after the Stall signal is removed.
Where is the refueling panel located ?
Refueling Panel is located under the RIGHT Wing
How does the fuel jettison work on the 757 ?
The 757 doesn’t have fuel jettison 🤣
What’s powered by the left hydraulic system ?
The landing gear, alternate brakes, and nose wheel steering, Left engine reverser, HMG if equipped are powered by the LEFT hydraulic system
How is the 757 gear uplock powered ?
The 757 gear uplock is electrically powered by the hot battery bus. If the battery is the sole source of electrical power, the gear should be lowered within 30-90 minutes
Does the 757 have RESERVE nose wheel steering like the 767 ?
The 757 does not have reserve nose wheel steering. Aerodynamic rudder control, differential thrust, and differential braking are used under these circumstances
What systems do not require bleed air on the 757 unlike the 767 ?
•Thrust Reversers
•Air Driven Pumps
•Cargo Compartment Heating
A SMOKE light illuminates on the overhead panel. What will the system do ?
Smoke is detected in the forward equipment cooling ducts the Forward E/E system automatically reconfigures to vent the smoke overboard.
If you press the EQUIP COOLING alternate switch what will happen ?
Activates the alternate supply fan in the forward equipment cooling system.
EQUIP COOLING OVHT light illuminates on the overhead panel what does it mean ?
Low air flow detected in the forward equipment cooling system on the ground (sounds intermittent horn in nose gear).
• Selected forward equipment cooling supply fan has failed.
• Overboard exhaust valve did not open when left
recirculation fan stopped.
• Both aft E/E fans are inoperative.
• Smoke has been detected in the forward equipment cooling system for more than 5 minutes.
What provides back up power to the left hydraulic system ?
The Power Transfer Unit (PTU) provides a source of back-up power to the Left (Primary) Hydraulic system.
When would the PTU activate ?
The Left Engine Fails
The Left Engine-Driven Pump pressure is sensed low
Note : The PTU uses Hydraulic Pressure from the RIGHT Engine-Driven Pump to power a Hydraulic Motor which in turn drives a Hydraulic Pump in the LEFT Hydraulic system.
Cost index for the 757
55
