Fuel manifold for gas turbine engine

A fuel manifold for a gas turbine engine comprising:

• manifold adaptors each supporting a nozzle for out-putting fuel from a fuel supply, each manifold adaptor having a primary conduit and a secondary conduit extending between connection ends of the manifold adaptor, the primary conduit and the secondary conduit being in fluid communication with the nozzle to supply fuel to a combustor of the gas turbine engine;
• transfer units between adjacent manifold adaptors, each transfer unit comprising:
• a primary transfer tube matingly connected at opposite ends to the primary conduits of the adjacent manifold adaptors for fuel circulation between the primary conduits, with seals provided been the primary transfer tube and the primary conduits, and at least one guide surface on a periphery of the primary transfer tube;
• and
• a secondary transfer tube matingly connected at opposite ends to the secondary conduits of the adjacent manifold adaptors for fuel circulation between the secondary conduits, with seals provided between the secondary transfer tube and the secondary conduits, and at least one complementary guide surface on a periphery of the secondary transfer tube the complementary guide surface cooperating with the guide surface of the primary transfer tube when the primary transfer tube and the secondary transfer tube are connected between the adjacent manifold adaptors, whereby the primary transfer tube and the secondary transfer tube are prevented from rotating by the cooperation between the guide surfaces and
• a drain sleeve connected at opposite ends to the adjacent manifold adaptors, the drain sleeve accommodating both the primary transfer tube and the secondary transfer tube so as to contain fuel leaks from the junction of the conduits and the transfer tubes, the drain sleeve in fluid communication with the manifold adaptor.