Hello,Is there possibly a "Simplified Cruise Flight Planning" performance chart for 767-300/300ER available somewhere? I tried to search AVSIM's File Library, but I couldn't find it. Also is there a "Simplified Alternate Flight Planning" perf chart?Also where I could I read about ETOPS concerning 767? Is the ETOPS cruise speed always Mach 0.82?Cheers!

Hi Fellow Pilot,First, your ETOPS question.ETOPS for a 767 is the same as ETOPS for any other twin engine comercial aircraft in terms of general procedures. The aircraft enters the ETOPS area when the aircraft is 1 hour single engine no-wind flying time (about 420nm for the 767) from a suitable diversion aerodrome and exits it when within 1 hour SE flying time on the other end. Most operators are probably certified for either 138 min or 180 min ETOPS (meaning the time to fly to a suitable diversion airfield weather above certain limits). ETOPS certification is based on the historical engine performance as well as company procedures and training. Prior to an ETOPS flight the aircraft must meet the requirements set out in the MEL (min equip list), which may be more stringent than the MEL for a non-ETOPS flight. If you have more specific ETOPS questions please post them and I will try to answer them for you.As to the speed, there is no specific ETOPS speed. It is whatever is economical (usually M0.80 for the 767; the 767 wing design results in a rather large drag rise and therefore higher fuel consumption when flown faster than M0.80) and whatever your assigned Mach number was (usually what you requested in your flight plan) in your oceanic clearance.As for simplified flight planning, try this. Flight plan distance divided by average groundspeed (using 460 TAS plus or minus wind component, consult an upper wind forecast chart for that) for total time enroute. As a good estimate I use 17000lbs for the first hour and then an average of 9000lbs per hour after that. Add your reserve (10000 - 12000lbs) and voila, you have your fuel requirement within a 1000 lbs or so.Kevin in CYOW

Hi Kevin!...about ETOPS:Still confused about the speed: is there a MINIMUM ground speed for the 767 to fly in ETOPS area? Meaning if there is too strong headwind over e.g. North Atlantic must the route then be changed and sometimes also the flight be cancelled?How do I also draw the "airport circles" in my NAT chart? Must the winds be accurately calculated or are those no-wind circles (purely round)? What is the range of the circles?The 767 is restricted to 180 minutes, correct? Does this mean that with one engine the time to fly to an airport is maximum 180 minutesand that with both engines out there's no way you can reach the airport which is 3 hours away from your position?Thanks a lot for your info,Fellow Pilot

Fellow pilot,There is no minimum ground speed for a 767 to fly in the ETOPS area. All other aircraft in the general vicinity will be affected by the same wind. Ultimately, ground speed is irrevelant.With respect to the winds and flight planning across the Atlantic, the routes will be varied from day to day to get a min-time route versus a minimum distance route. That is, going eastbound, the min-dist route will be modifed to take advantage of the jetstream and for the return westbound trip the route will be modified to avoid the jetstream. In the summer this usually, but not always because the jetstream does meander around, means that eastbound trips will cross somewhere between 50n and 55N latitudes and the westbound trips are usually further to the north, around 55N to 60N (or higher) latitude. The daily NAT track message will publish routes which take the jetstream (and a few other factors) into account. Here is a link to the daily NAT track message.https://www.notams.jcs.mil/ Click on the link on the left side called "track system" and then on the NAT track title on the page that comes up.With respect to the circles you are talking about, you don't wasnt to draw 180 min circles from these aerodromes because most aerodromes are much closer than that. I think what you really want are the Equal Time Points (ETPs) between diversion aerodromes. This are drawn taken into account the winds and single engine cruise speeds. For a computer generated flight plan it will include the ETP data for the pilots. There are also methods to handraulically work them out as well.Let's say for a Toronto or JFK flight to London Heathrow, enroute ETOPS diversion airports may be Gander and Shannon and your ETP would be between these two airports. If the route goes far enough north you may have Keflevik as well so that you have a Gander/Kef and a Kef/Prestick (for example) ETP, etc.And if both engines quit, well then you swim! ETOPS can stand for "Engines Turn Or People Swim".Does this help at all? Cheers,Kevin in CYOW

Fellow Pilot,I looking for something else but stumbled across this link. It is a presentation about ETOPS and although I just had a quick look it looks like it might help you understand the whole ETOPS thing a bit better.www.ifalda.org/IFALDA%20Web%20PPT%20Folder/ ETOPS%20breifing%20%202002.ppt Kevin in CYOW

Hi Kevin,Thanks a lot for your answers!How do they make sure that the time to the nearest airport doesn't exceed 180 mins if ground speed doesn't matter? For example in a flight over the Pacific Ocean where the nearest aerodrome would at some point be around 160 mins away (no wind) and there is also strong headwind in the area, how do the pilots make sure that they don't violate the 180 min limit? Cheers,Fellow Pilot

Fellow Pilot,You may not like the answer but the actual enroute winds (and therefore groundspeed) are NOT required to be taken into account in determining the ETOPS diversion airport requirments. The crews plot the 180 min/1272nm (or 138 min as certified)arcs from the suitable diversion airports on the map and ensure their route of flight remains within these arcs. Actually, they are allowed to go outside these arcs as long as it is not for more than 30 nm at a time.For flights operating in the North Pacific, the 180 min ETOPS requirement will allow random routing flights to at least 40N latitude (i.e. no restriction on routing for ETOPS reasons). 138 min ETOPS in the North Pacific gets more problematic but can still be done. If you want to see the various ETOPS areas plotted on a world map go to this link:http://gc.kls2.com/Type in, for example, CYVR-RJAA for the routing, and tick off the 180 min or 138 min ETOPS box. This will bring up a map showing the great circle route and the selected ETOPS no-go zones.Kevin in CYOW