Def-Stan 00-970 Part 5 has not yet been published.
DEF STAN 00-970 PART 1/5
SECTION 5
5.2 FUEL SYSTEMS
5.2.87 No vent or drainage provision may end at
any point:
(a) Where the discharge of fuel from the vent
outlet would constitute a fire hazard.
(b) From which fumes could enter personnel
compartments.
5.2.129 Fuel or vapour shall not enter any part of
the aeroplane as a result of fuel jettisoning