The following quotation (the remainder of this post) is from the oneworld timetable, valid August 5, 2005, through September 2, 2005, in the section entitled oneworld benefits.

Lounge access by class of travel

Customers flying First or Business Class have access to the equivalent class of lounge regardless of their frequent flyer status. (First Class passengers may be accompanied by one guest traveling on a oneworld sold/operated flight.) Customers flying in Economy class on the domestic or intra-European segment to connect to or from a oneworld longhaul First or Business Class flight can also use the lounge applicable to the class in which they are travelling the longhaul segment.

Access is available on the day of departure when your next onward flight is with a oneworld member airline. Access may be restricted at a limited number of third-party lounges or due to capacity constraints. Arrivals lounges are not part of the oneworld lounge policy. American Airlines and Qantas offer programmes enabling a customer to pay to gain access to their lounges. These programmes are not part of the oneworld agreement, and members of these programs are not entitled to access lounges under the oneworld agreement.

Exception: American Airlines AAdvantage members, regardless of their tier status, may not use lounges when travelling on solely North American itineraries (defined as within or between the USA, Canada, Mexico [except Mexico City], the Bahamas, Bermuda and the Caribbean). In these cases, access rules are governed by American Airlines' own rules (ie paid lounge-access membership).

Note:
All oneworld benefits are only available to passengers on scheduled flights that are both operated and marketed by a oneworld member airline. (Marketed means there must be a oneworld member airline flight number on the ticket.) LAN ECUADOR is not a member of oneworld and does not offer any oneworld benefits.