Greek Islands and Canaries always a struggle for fuel, depending on wind with the 737-200. Pratt and Whitney JT9D if I remember. Re-fuelling stop quite common on BHX and MAN routes from those destinations
77 - may seem picky but JT9D's would scrape the deck on 737, also thrust of approx 50,000 lbs - they were JT8D's at 17,000lbs