• Drop line—drop lines allow ground crew to assist the  pilot in landing in a confined area, or to move the balloon  to an area better suited for deflation and retrieving. A  good drop line has a quick release provision; is easy to  deploy, recover and store; and is easy for a person on  the ground to handle. Webbing is a popular drop line  material because it is strong. Webbing is hard to roll  up, but easy to store. Half-inch nylon braid is strong  and is easily rolled into a ball and put in a bag.  • Spares—the following are recommended spares to carry  in the chase vehicle or to have on hand: * Local and aeronautical maps * Helium tank and pibals (pilot balloons) * Quick pins and carabiners * Gloves and helmets * Envelope fabric and/or patches * Refueling adapters * Spare tire for the trailer * Extra fuel for the fan * Extra strikers/igniters • Gloves—pilots and crew members should develop  the habit of wearing gloves anytime they handle the  balloon and associated equipment. A well fitting pair  of gloves can reduce the injuries that occur while  handling balloon equipment, such as rope, cables,  bag handles, etc. In the case of a small fuel leak at  a burner fitting, gloves can minimize a potentially  disastrous situation. • Helmets—balloon manufacturers usually mandate  protective headgear be worn, especially in high wind  conditions to protect heads from impact injury. Store  helmets in a bag that can be carried inside or outside  the basket, depending on number of passengers and  available room. A Standard Airworthiness Certificate is issued for aircraft type  certificated in the normal category for manned free balloons.  A Standard Airworthiness Certificate remains in effect as  long as the aircraft receives the required maintenance and is  properly registered in the United States. Flight safety relies,  Gloves should be made of light colored smooth leather  to reflect/deflect propane, and gauntlet style to cover  the wrist. Avoid synthetic material which melts in  heat and ventilated gloves which let in flame or gas.  A second pair of gloves, of appropriate rubberized  material and looser fit, can be used to conduct  refueling operations.  An Airworthiness Certificate is issued by a representative  of the FAA after the balloon has been inspected, is found to  meet the requirements of 14 CFR part 31, and is in condition  for safe operation. The Airworthiness Certificate must be  displayed in the aircraft so it is legible to the passengers  and crew whenever it is operated.  [Figure 2-14]  The  Airworthiness Certificate is transferred with the aircraft  except when it is sold to a foreign purchaser. Aircraft Documents Airworthiness Certificate Figure 2-14.  Standard Airworthiness Certificate. 2-11