Differences Flashcards
757 & 767 Differences
The 757 has a stand-pipe in each of the three hydraulic reservoirs. The fluid is used for:
L- PTU | C - RAT | R - RSV Brakes
The 767 has a single stand-pipe in the center hydraulic system. The fluid is used for:
RSV Brakes and Nose-wheel Steering
The 767 has an ADP (Air Demand Pump) on the center system and the 757 does not.
The ADP is driven by the pneumatic system and augments the center hydraulic system on the 767. When selected to AUTO. The system activates for the following reasons: Flap Operation Gear Retraction Ground Spoiler Low Pressure
767 HMG (Hydraulic Motor Generator [if installed]) is driven by the ADP and will be powered in the event of what?
Loss of both left and right AC Busses, provided the pump switch is in AUTO.
The 757 total fuel capacity is 75,000 pounds.
The 767 in comparison has how much?
767-200 : 112,000 pounds
767-300 : 162,000 pounds
The 767 Refueling Station is under the left wing.
The fuel temperature is taken in the left main tank on the 767.
The 757 Refueling Station is under the right wing. The fuel temperature is taken in the right main tank on the 757.
The 767 ER is the only aircraft that can jettison fuel and only from which tank?
The Center Wing Tank at about 1,600 pounds per minute.
It is possible to jettison all Center Wing tank fuel and still be overweight.
The 757 Landing Gear is operated on the Left Hydraulic System.
The 767 Landing Gear is operated on the Right Hydraulic System.
On the 767 only the gear doors have up-locks and the main gear are held up by the doors.
The 757 has gear door and gear - up-locks.
The 757 Uses a DC electric driven hydraulic pump to operate the alternate gear extension.
The 767 uses a DC electric motor to operate mechanical linkage to unlock the main gear doors and the nose wheel up-lock.
The 757 and 767-200 do not have a tail skid.
The 767-300 has a tail skid powered by the center hydraulic system.
The 757 Engine Bleed Valve is located before the Cowl Engine Anti-Ice Valve
The 767 Engine Bleed Valve is located downstream of the Cowl Engine Anti-Ice Valve
The 757 has normal braking on the right hydraulic system; alternate braking on the left hydraulic system; and reserve braking on the right system.
The 767 has normal braking on the right hydraulic system; alternate braking on the center system; and reserve braking is also on the center hydraulic system.
The 767 has a Cargo Heat panel located on the overhead panel, which controls the FWD AFT & BULK cargo.
The 757 had no controls for the Cargo Heat on the overhead panel, and is completely automatic.
Should a cargo compartment fire occur on the 757 or 767-200, the first and second fire bottle must manually be discharged.
(2 Switches)
On the 767-300 ER, the bottle discharge automatically discharges the 1st bottle and then 30 minutes later or upon landing the second bottle is also discharged.
(1 Switch)
The 767-200/300 primary thrust setting is the N1.
GE Engines) (P&W uses EPR
The 757 uses the EPR gauge as the primary thrust setting.
