Flexible printed circuit board harness

A method of assembling a gas turbine engine installation comprising:

• providing a flexible printed circuit board harness arranged to transfer electrical signals around the pas turbine engine installation;
• attaching the flexible printed circuit board harness to a remainder of the gas turbine engine installation by inserting a portion thereof into a mouth of a jaw of a clip, the jaw extending from a base of the clip, and the mouth extending across a width, wherein:
• the jaw comprises an upper set of teeth comprising at least two teeth, each tooth in the upper set of teeth being separated from other tooth or teeth in the upper set of teeth in a direction pointing from the mouth to the base and a lower set of teeth comprising at least two teeth, each tooth in the lower set of teeth being separated from other tooth or teeth in the lower set of teeth in a direction pointing from the mouth to the base,
• each tooth being elastically deformable and having a root and a tip, and extending across at least a part of the width of the mouth, the upper set of teeth and the lower set of teeth being configured to grip the flexible printed circuit board therebetween;
• and
• teeth of at least one of the upper set of teeth and the lower set of teeth extend from the root to the tip in a direction that has a component pointing from the mouth to the base such that a force required to insert the flexible printed circuit board harness into the mouth of the jaw is lower than a force required to remove the flexible printed circuit board harness from the mouth of the jaw.