<P> Balloons in most parts of the world are maintained in accordance with a fixed manufacturer's maintenance schedule that includes regular (100 flight hours or 12 month) inspections, in addition to maintenance work to correct any damage . In Australia, balloons used for carrying commercial passengers must be inspected and maintained by approved workshops . </P> <P> In the case of a snag, burn, or rip in the envelope fabric, a patch may be applied or the affected panel completely replaced . Patches may be held in place with glue, tape, stitching, or a combination of these techniques . Replacing an entire panel requires the stitching around the old panel to be removed, and a new panel to be sewn in with the appropriate technique, thread, and stitch pattern . </P> <P> Depending on the size of the balloon, location, and intended use, hot air balloons and their pilots need to comply with a variety of regulations . </P> <P> As with other aircraft in the USA, balloons must be registered (have an N - number), have an airworthiness certificate, and pass annual inspections . Balloons below a certain size (empty weight of less than 155 pounds or 70 kg including envelope, basket, burners and empty fuel tanks) can be used as an ultralight aircraft . </P>

How many pounds can a hot air balloon lift