14.34 What are the average and maximum glideslope for a 737 OR 777?

From FlightSim

If you are talking of ILS Glide slope it is not based on aircraft but the obstructions on the approach path and generally conform to 3deg glide angle generally achieving 200 ft height over the MM and 1400 ft over the OM(as per Jeppesen) but it can be more than that depending on the approach path obstacles. for example Bombay has a 3.3 deg glidepath due to this.

In general the descents are also made at conformative slopes. Generally at around 2500fpm. If your average ground speed is 8nm/minute then that is around 300ft/nm and so, at 3deg glide. However,depending on traffic ATC may give late descent clearances. Then, just got to reduce speed earlier itself, use speedbrakes, sometimes even the Landing gear(at placard speeds of course) throttle back and come down fast. One should avoid this as far as possible due to passenger discomfort (rapid change in cabin pressure) but in cases when unavoidable at least ensure through pressurization, that the rate of change in cabin pressure is kept gradual! I have not checked the slope but you do get aircraft RODs of about 4000fpm or near about. This is about average for 737 class to 747 class of jet transports.

Bala