AC 25.981-1C Flammability Requirement

AC 25-981-1C  Requirements:

Under Normal condition                     20 or max 50µJ & 25 mA RMS

Under Failure condition                      200µJ & 50 mA RMS

For lighting induced transient            125 mA Peak

Surface Temperature                          450^oF (max temp) – 50^oF (margin) = 400^oF

Flammable Fuel Property                   468^oF for JP-4

                                                                435^oF – 450^oF for JP-1

Monte Carlo Analysis                          Flammability   <= 3%  Normal Day

                                                                                          <= 6%  Warm day limit

Fuel Discharge Rate                            1 m/s (uncovered)

                                                         6 to 7 m/s (covered)