Aircraft parts and other equipment shall preferably be cleaned with non-flammable cleaning agents or solvents. When the use of flammable solvents cannot be avoided, only liquids having flash points in excess of 100 degrees Fahrenheit shall be used and special precautions shall be taken to eliminate ignition sources in compliance with good practice recommendations of the NFPA.
N.J. Admin. Code § 19:76-4.13