§29.1187 Drainage and ventilation of fire zones

(a) There must be com plete drainage of each part of each designated fire zone to m inimise the hazards resulting from failure or m alfunction of any component containing flammable fluids. The drainage means must be: (1) Effective under conditions expected to prevail when drainage is needed; and (2) Arranged so that no discharged fluid will cause an additional fire hazard. (b) Each desi gnated fi re zone must be ventilated to preven t the accum ulation of flammable vapours. (c) No v entilation o pening m ay b e wh ere it would allow the ent ry of fl ammable fl uids, vapours, or flame from other zones. (d) Ventilation means must b e arran ged so that no discharged vapours will cause an additional fire hazard. (e) For Category A rotorcraft there must be means to allow the crew to shut off t he sources of forced v entilation in an y fire zo ne (o ther than the engine power sect ion of t he powerpl ant compartment) unless the am ount of ext inguishing agent and t he rat e of di scharge are based on the maximum airflow through that zone.