Had the air conditioner compressor replaced under warranty and just purchased a new compressor in 2014. That's three compressors in 16 years. Also replaced the blower motor and capacitor along with the TXV valve and filter dryer in 2014. The Puron has escape over the winter of 2014 and again in 2015.
The cruising altitude of a 747 depends on weather conditions,  weight of the aircraft, and the amount of traffic on the other  flight levels. Its average cruising altitude i â¦ s around 33,000 feet.
The 747-400, the most common passenger version in service, has a high-subsonic cruise speed of Mach 0.85â0.855 (up to 570 mph or 920 km/h) with an intercontinental range of 7,260 nautical miles (8,350 mi or 13,450 km).t is available in passenger, freighter and other versions. Boeing designed the 747's hump-like upper deck to serve as a first class lounge or extra seating, and to allow the aircraft to be easily converted to a cargo carrier by removing seats and installing a front cargo door.