757/767 Differences

[Gards]

Does anyone know of any informative websites on the differences between the 757 and 767? I am looking for 50 of them!

Thanks,

Gards

[NISHTA]

You can try this one:

http://www.757.org.uk/diff/index.html

Hope it helps....:ok:

[chuzwuza]

Does that mean fifty websites, fifty aircraft or fifty differences between them?

[Brian Fantana]

Here is a useful website, then follow the link to 767 differences

http://www.757.org.uk/

[Bolty McBolt]

1/ You step up into a 767 cockpit and down into a 757 :ok:

[Floppy Link]

1. Step up / step down as discussed above
2. Bigger
3. Heavier
4. Goes further
5. aileron lockout
6. tail bumper
7. bags/cargo in containers or pallets
8. ADPs in hydraulic systems
9. fuel jettison
10.entry doors electric up and over thing
11.landing gear differences - drag brace and side brace.
12. Bigger engines
13. For manual start valve closure the "volunteer" has to lie down under the engine rather than fish around through a flap on the side.
14. Different flap load relief criteria
15. Thrust measured by EPR (757) and N1 (767) (- on the engines I was used to...)
16. Left hyd system is "heavy" on 757, centre on 767
17. Below 50% in a hyd reservoir will produce an RSVR light on the 757 but a QTY light on the 767
18. RSVR light on 767 also lights for low pneumatic head pressure in the hyd reservoir
19. only centre hyd reservoir in 767 has a standpipe (reserve brakes), all three in 757
20. 757 has a Reserve Brakes switch, 767 has Reserve Brakes and Steering switch.
21. 757 main gear truck tilts nose up, 767 tilts nose down.
22. ALTN GEAR EXTEND on 767 activates solenoid to release the geardoor uplocks, on 757 it activates an elec motor to drive a hyd pump to release the gear and door uplocks.
23. so....in the 767 with total loss of AC power, get the gear down before you lose the battery

Apologies if some of these are rubbish, it's over 2 years since I flew them...and my notes are even older still. But we're almost half way!

[Gards]

Thanks to all!

[esreverlluf]

Don't forget that there are also differences between 767-200 and 767-300 models and even within these series depending on engine type. And lets not even think about the 767-400!!

There may also be significant differences based on customer options.

[Floppy Link]

24. Different minimum radius of turn on taxiway
25. Different approach category
26. Inboard ailerons on 767 (alluded to in the aileron lockout above)

27.?

[NW3]

27. Automatic cargo fire discharge 767
28. 757 is cat C, 767 is cat D
29. Two isolation switches on 767
30. runway turnoff lights on wing 767, gear 757
31. 767 has nicer jumpseats in flight deck.......
(I'm struggling now :))

[wileydog3]

You forgot the world's worst oral question, "How does the recirculation fan work on the 757 versus the 767 and when does it operate and not operate?"

My response that got me in a bit of trouble was, "It operates all the time it is supposed to operate unless it is broken or malfunctioning and then we go into the log, find the proper maintenance code and write it up, right?"

[Panman]

10.entry doors electric up and over thing
.......
12. Bigger engines
13. For manual start valve closure the "volunteer" has to lie down under the engine rather than fish around through a flap on the side.
....
15. Thrust measured by EPR (757) and N1 (767) (- on the engines I was used to...)

#10. Not necessarily so - I believe this is a customer option. I have yet to work on a 767 that has electric doors (I am familiar with Monarch, Zoom, Britannia, and Silverjet). The ones I that have worked on, activating the handle lifts the door part of the way, a loaded spring then assists manual movement of the door the rest of the way. It would have been better of just stating that the 757 doors open outwards, while the 767 slide inwards and upwards.

#12. Depends on engine type. RB211 engined 757/767s would be about the same size I think (hazarding a guess as I have only worked the E4s and not the H/G's)

#13. Again depends on engine type.

#15. Engine type yet again. RR's (and PW's I think - haven't worked those so probably wrong - going by hearsay from years ago) use EPR on the 767. GE's use N1.

[mavrik1]

QF 767's have electric doors! That must mean its a better company??? Get over it mate! give-em a break!

[caaardiff]

#10. Not necessarily so - I believe this is a customer option. I have yet to work on a 767 that has electric doors (I am familiar with Monarch, Zoom, Britannia, and Silverjet

All of the above mentioned airlines have electric doors. I'm not entirely certain if all doors are electric, but generally Doors L1 & L2 are electric.
I know Brittania (Thomsonfly) and Silverjets ex TOM 762's have as ive operated them myself. And i've seen Zoom and Monarchs.
However I dont think L4 is electric powered

[misd-agin]

Some of these might be customer aircraft specific -

32. Fuel capacity different between each model.

33. Cockpit size. 767 originally designed for 3 pilots. Early model 767-200's had a really nice sized cockpit. About 3' more space in rear portion of the of cockpit.

29. (corrected?) Air conditioning system has 3 isolation valves 767 and one on the 757.

34. 767 has switch to regular cargo heat in a narrower temperature range (animals in cargo hold)

35. Cockpit shoulder/foot heat different. 767 in flight only. 757 foot heat works on the ground(doing more preflights...;))

36. PTU (hydraulic Power Transfer Unit) - 757 for nose wheel steering. flaps/slats, landing gear, HDG(hyd driven generator). 767 PTU - stabilizer trim only

37. Anti ice - 757 - three leading edge slats just outboard of the engines
767 - outermost 3 slats

38. Older 767-200's don't have enough bleed air from engine for anti-ice at idle power so power must be monitored to ensure engine anti-ice operation during descent.

39. 757 has three cabin zone temperature controls. 767 has 4.

40. 757 has two models -200/-300. 767 has three models -200/-300/-400.

41. 757 has one aisle. 767 has two.

42. 757 has standard toilet system. 767 has suction system.

43. 757 refueled right wing. 767 left wing.

44. Fuel temp read right wing 757, left wing 767.

45. (44. tied to hydraulic coolers - 757 one in right wing, two in left wing. 767 = 1 in left wing, 2 in right wing)

46. Stabilizer trim - 757 = C and R hyd systems. 767 = C and L hyd systems.

47. 757 cockpit air comes from the left pack. 767 cockpit air comes from the mix manifold.

48. 757/767 'BLEED' warning lights have different meanings :ugh: (at least with our engines)

49. 767 has cargo heat switches. 757 is automatic.

50. 757 nose wheel steering, with rudder pedals, is 1 degree greater 767.

51. Alternate and reserve brakes get hydraulic pressure from different sources (757 vs. 767).

52. Antiskid protection different between 757/767 while using reserve brakes.

[Check Airman]

You forgot the world's worst oral question, "How does the recirculation fan work on the 757 versus the 767 and when does it operate and not operate?"

My response that got me in a bit of trouble was, "It operates all the time it is supposed to operate unless it is broken or malfunctioning and then we go into the log, find the proper maintenance code and write it up, right?"

I'd have given you full points for that:D

[Check Airman]

33. Cockpit size. 767 originally designed for 3 pilots. Early model 767-200's had a really nice sized cockpit. About 3' more space in rear portion of the of cockpit.

A few years ago, I was made to understand that the 757 and 757 cockpits were the same size, which of course caused a problem for Boeing, but they eventually overcame it. Am I mistaken?

[Swedish Steve]

43. 757 refuelled right wing, 767 left wing.
Well go and look on a BA 767 right wing, and you will find A SECOND refuel panel.
The story is that when they bought the aircraft, one of the options was refuelling from right wing as well as left. The guy that ticked this box thought he was buying a second set of refuel couplings. He got a complete refuel panel. (If both are open the left one takes priority)

[Panman]

All of the above mentioned airlines have electric doors. I'm not entirely certain if all doors are electric, but generally Doors L1 & L2 are electric.

I know Brittania (Thomsonfly) and Silverjets ex TOM 762's have as ive operated them myself. And i've seen Zoom and Monarchs.
However I dont think L4 is electric powered

Well considering that I operated the L1 door on G-SILC, took it apart, and missed having to put it back together and rig it (because i was off that weekend when it was being put back together) - when we were doing the check after it left Thomsonfly and before it went into service with Silverjet......and it sure as hell was not electrically operated then - so they must have had it converted since it left our hangar mid-october.

Monarch's 767 does NOT have electric doors (had to fit a slide on one and three of us had to hang on the door to get it closed because a slide was not fitted and the door was open), neither do ZOOM's (I rigged the L1 door handle on one of them sometime last year).

But of course, I defer to your superior knowledge.

pAnmAn

[caaardiff]

I know the TOM 763's are as i worked with them all summer and have been for many years.
I haven't seen 762's for about 2 years, but when i last saw them they were opened by the crew using the electric controls.

Zoom's 767's do as they fly into Cardiff twice a week, and i was actually with one today as the crew closed the doors. (Assuming we are on about the Canadian reg's??)

[stilton]

The 767 does not have a PTU !

[yeoman]

No PTU but it does have a Pitch Enhancement System (PES).
"Heavy Hydraulic System" Left on 75, Centre on 76.
75 all hyd pumps function all the time, 76 has an element of demand in the secondary pumps.
75 C Hyd is 2 electric, 76 Primary is Air Driven Pump (ADP), secondary 2 electric.
CF6 80A reversers are hydraulic, CF6 80C reversers are pneumatic
To be anal, it is the Bleed rather than Aircon that has different valve configs. 75 has one,on 76 one for eaxh L and R Eng Bleed with a Centre (or Body Duct) isolation as well.
Discrete lights different on Bleed system of 76 and mean different things (Also varies with -200 and -300 dependant on engine fitted) Let's put that in the "Too difficult" file!
75 single aisle, 76 twin.
75 2 zones for aircon in cabin 763, 3 zones
Additional Trim Air Valve position indicator for Flight Deck on 763
Autoland: Things happen at different heights on the 76 (such as nose up trim bias etc) See "Too difficult" file.
76 cargo hold fitted for ULD, 75 is bulk loading
Cargo heat on 76, not on 75
Waste tanks from crappers at rear and single drain, vacuum type on 76, caravan type chemical and multiple drain on 75
Crew oxygen overpressure blow off indicator in different places
Forward cargo hold lock indicators fitted on 763, not on 75.
Electrics arranged slightl;y differently (See "Much, much, much too difficult" file.
Sold as a common type but built in different plants and the design teams did arrange to have lunch together once but it never happened.
Can't think of any more. I'm off to polish my lawn mower.:{

[mustafagander]

yeoman, are you sure about the B767 C hyd system? On my brand of B767 the C hyd system has 2 electric primary pumps and an air demand pump.

[caaardiff]

Ok maybe i'm getting the wrong end of the stick here.
We are talking about the main passenger doors L1, (and possibly L2) being electrically operated by the crew to open and close them from the inside?

[yeoman]

Mustafa

You are quite correct, mea culpa etc! Next time you are in the sim (if you haven't already tried this!) look at an ADP failure on Take Off. It gets quite exciting. The ADP fails and as it is the big mama of pumps in the C system (37 odd gpm as opposed to 5 gpm for each electric IIRC) the gear takes several days to retract. This means that you get a Gear Disagree as it over runs the time inhibit. You also get a SYS PRESS message as the pump has been signalled to operate so that inhibit is also removed. There will also be a PRESS discrete on the pump pnael. As the situation lasts over however long, you also get a latched MAINT message on the Status page.

Once the gear comes up it all goes away like magic. Gives you hours of fun if you are running the exercise, not so much fun if you are in the seat as it all happens seconds after take off.

Another good one is to fail an ADC on take off but that is for another day!"

Doors: Electric at L1 and L2, up and over, operable from inside and out. (L1 only on -200). That's the TOM fit, don't know if it is an option or not.

[BestonBoard]

Not really my area for tech purposes, but I can confirm all of Silverjets 767's L1 doors are electrically operated. You need to manually rotate the handle to release the door and you will find a button on the L1 Panel that says 'Door Up'... :)

[Panman]

G-SILC does not have electrically operated doors. You have to lift the handle (inside and outside), the loaded spring pulls the door up partially and you have to manually lift the door the rest of the way. I was intimate with the door for the duration of the check when it was in our hangar. In order to remove the forward toilet I had to remove the trim and the interior handle on the L1 door.

And yes I was refering to the Canadian reg Zoom's, also specifically C-GZUM which was the first 767 that I had to rig the door handle (the old 4-5 inch block of wood under the exterior handle as per the AMM).

This is like beating my head on a rock so I am going back to lurking.


pAnmAn

[Spooky 2]

Well...heck, as long as everyone else has an opinion on the electric doors let me just say that the Quantas B767-238ER has a electric door at 1L and all others are manual.

[Short_Circuit]

767 still in production

757 Gooone
(and ugly)

S_cct

[misd-agin]

Ugly?

Hrrumppph. That's a matter of opinon. I think it's the sexiest looking airliner.

Long legs, slender build, with nice, powerful jugs. What's not to like?

[Bolty McBolt]

The 767 does not have a PTU !

Many but not all of the 767-300 in the QF fleet have a PTU.
Lives in the stab compartment... Drives the stab when sh$ts are trumps..:ok:

[Pontious]

Couldn't agree more, Misd'

One powerful,powerful lady!

Flown a few empty on positioning flights post maintenance WOW! - 40odd tonnes of thrust lifting 50odd tonnes of empty aircraft- YYAAAHHHOOOOO!!!!

Like sha**ing a fat bird!- Bloody good fun at the time, leaves you covered in sweat but you don't want to do it ALL the time!
:ok:

[codpiece face]

Think you will find the monarch 767 has electrically assisted l1 and l2 doors, you may not realise where the switch is as it on the attendants panel and looks like 2 light switches with small arrows. Not sure about the zoom aircraft although the neos aircraft which are sister ships to the second 2 nc and na have electric doors.

The 757-300 has a tail skid and vacuum lavs, and the cargo doors are very different on the 767 ( the fwd lifts and drops into the hole, the aft is similar to the 757 )

On the 767 the turn off lights are in the wing root, the 757 are on the nose gear.

On the 767 you have access to the ee bay through the cabin.

The 767 has less flaps and a bulk cargo door on the lh side of the aircraft.

The best thing about the 767 rev's are an option of electrical opening, have worked on pw40000 with this and have heard that there is an option on the ge also.

[yeoman]

767 Inboard Ailerons (already mentioned) droop with Flap 5+.
767 Flap 1 is all Slat (no Flap)
767 Flap 30 and Flap 25 have overspeed (blowback) protection (Only on F30 with 757?)
767 at High GW has a Vref30+80 (min clean) in excess of Flap 1 Lim (250 kts)!
TOM has (had?) a pair of 762s with the -80C engines normally fitted to the 763. These 767-200Gti were a lot of fun on ferry flights, a 5000' stop height on a SID could be a problem! Automatics were way behind. Off MAN 23L you can get FL410 by BHX with pretty much normal operation (ie not hanging on the stall).
Oh, and did I mention the doors?:E

[mono]

For check Airman,

You forgot the world's worst oral question, "How does the recirculation fan work on the 757 versus the 767 and when does it operate and not operate?"

My response that got me in a bit of trouble was, "It operates all the time it is supposed to operate unless it is broken or malfunctioning and then we go into the log, find the proper maintenance code and write it up, right?"

I'd have given you full points for that

So what about load shedding, engine start, fire in the hold?? There are times when the re-circ fans switch off because they are supposed to!

To enter the door debate. I am a licenced a/c engineer rated on the 767 and I have yet to work on a 767 that does NOT have at least 1 electrically operated pax door. There are switches under the exterior handle and on the FAP for the relevant doors.

[wileydog3]

Thanks.

I hate those dumb 'laundry list' oral questions which have nothing to do with anything except completing a rite of passage. On systems like the recir fan, there is little I can do if it does not operate when it is supposed to except write it up.

"What seven things happen when you pull the fire handles?" right.. so if one of the seven things does not occur, since they are automatic and can not be accessed, you are not going to be able to do anything about it anyway.

Like on the Citation II.. "What x things are fed by bleed air?" Right...

Now, a major question would be do you step up or step down on the 767? That is important. If one tumbles into the cockpit, it invariably creates a cloud of doubt and lack of confidence in the pilot by the F/As and any passenger seeing the event.. and if the Capt uses colorful language to mitigate the pain, that is likely to cause a letter by someone who is 'offended' by such brusque words.

[misd-agin]

Oh, here's little gotcha. Nice oral question because it causes some confusion when seen on the line. (ask me how I know....friend asked and I had no clue :confused:)

767-200 flaps 5 T.O. inboard aileron doesn't droop
767-300 flaps 5 T.O. inboard aileron droops (remember, big jet needs all the lift it can get)

[wobblyprop]

767 has 5kVA HMG 757 has 10kVA HMG

[stilton]

There is a difference between the PTU on the 757 which is a true power transfer system (try shutting down the left engine leaving the right running to hear the odd noise it makes !)

This transfers hydraulic power from the right to the left side (heavy) hydraulic essential services.

The PES or Pitch enhancement system on the 767 is completely different.

[Check Airman]

For mono:

So what about load shedding, engine start, fire in the hold?? There are times when the re-circ fans switch off because they are supposed to!

He said "It operates all the time it is supposed to operate unless it is broken or malfunctioning"

So he's 100% right...:):ok:

[av8boy]

Hey, I'm just an ATCer, but my best friend's a Delta pilot. When I asked him this very question some years ago, he said, "when I put out my elbow it hits a window in a 75. It doesn't hit a window in a 76."

Of course, he lies.

Dave

[p1fel]

767 Centre fuel scavange , 757 none
767 Flap 1 leading edge slats only, 757 Flaps 1 leading edge + trailing edge flaps

[cym]

Know that AA AB IF and IG were all had electronic door opening / closing