Couldn't really make out if the crew said anything about the first engine failure but the second was overheating so they had to back off on the power and from then on kept losing altitude. Assuming the second engine overheating was not related to the first engine failing (except that higher power would be needed for single engine op), what would be the likely cause of engine overheat at sea level and about 73F temperature? Engine beyond time for overhaul? Remembering back in history, UA insisted on having 3 JT8D's when Boeing was developing an airliner smaller than the 707 due to their Denver hub being hot and high. When the 737 came into play, I remember some of those July and August days with Denver's temp around 110 and wondering if 737s were ever going to rotate. This was a 737A so it had the higher thrust engines when it left the factory but how much is the thrust loss when they reach time for overhaul?