A Technician describes a practice started by Engineering of making available a PDF version of their Component Engineering Orders (EO) for field use; instead of putting the EO information for their B767/B777 aircraft in the aircraft Manufacturer's Illustrated Parts Catalog (IPC). The web page presentation has been very confusing with erroneous links.

Narrative

Company Engineering started the practice of making available PDF versions of the Component Maintenance Manual (CMM) Engineering Orders (EO) for field use; instead of putting the information in the Boeing Illustrated Parts Catalog (IPC). These Engineering Orders are generally used for cabin furnishings/galleys/seats and the like. The web page that is used to deliver this information to the Mechanic contains Aircraft Effectivity and links to the effective Engineering Orders.Some of these are for obsolete equipment that has been long removed. The overall layout of the site is very confusing and has erroneous links/labels; and within it; is a link to another EO site with a different presentation; different labels and erroneous labels/links for those Engineering Order manuals. I fear that someone is going to mistakenly put the wrong part on the wrong seat/component. The chances of an actual unsafe condition are low; but there is greater probability of an FAA violation. The mistakes seem to be only with the presentation [display] of the Component Engineering Orders. The data contained within seems to be OK. The trick is getting to the correct EO to begin with. The problems I am aware of are in the B767 and B777 index of the web page.I have tried for over a year to get someone to update the information with Engineering requests; no luck. I hope that someone can convince Engineering and [Technical] publications to get together and correct how this information is presented and correct the effectivity problems. The new B777s are on the way with all new cabin interior; it would be nice to have a solid foundation to deliver this new data.