Navigate / EASA

CS 27.1013  Oil tanks

ED Decision 2003/15/RM

Each oil tank must be designed and installed so that –

(a)     It can withstand, without failure, each vibration, inertia, fluid, and structural load expected in operation;

(b)     (Reserved)

(c)      Where used with a reciprocating engine, it has an expansion space of not less than the greater of 10% of the tank capacity or 1.9 litre (0.42 Imperial gallon/0.5 US gallon), and where used with a turbine engine, it has an expansion space of not less than 10% of the tank capacity.

(d)     It is impossible to fill the tank expansion space inadvertently with the rotorcraft in the normal ground attitude;

(e)     Adequate venting is provided; and

(f)      There are means in the filler opening to prevent oil overflow from entering the oil tank compartment.