Beginning Wednesday, the airlines' self-created "service commitments" go into effect. To read a copy of a carrier's service commitment, go to the carrier's Web page or request a copy by phone or mail. Contacts for each major airline are listed below. (Note: Some of the phone numbers listed will require you to navigate a web of menu choices until you find someone to complain to.)

* American: www.aa.com/csp

For complaints or copies of the plan, contact MaryAnne Cipperly, Customer Relations managing director, Mail Drop 2400, P. O. Box 619612, Dallas/Fort Worth Airport, Tex., 75261-9612; telephone 817-967-2116.

* Continental: www.continental.com /service/

Complaints or plan requests to Judy Dyar, customer service representative, P.O. Box 4607 HQSCR, Houston, Tex., 77210; telephone 1-800-932-2732.

* Delta: www.delta-air.com/gateway /about/cusserv/index.html

Complaints and requests to P.O. Box 20980, Atlanta, Ga., 30320; telephone1-800-221-1212.

* Northwest: www.nwa.com/plan/ comm1.html

Complaints and plan requests to: Cindy Scheer, director, customer and sales support, Customer Relations, Mail Stop C6590, P.O. Box 11875, St. Paul, Minn., 55111-0875; telephone 612-726-2046.

* Southwest: www.southwest.com/ about_swa/customer_service_commit ment.html

Complaints and plan requests to: Jim Ruppel, vice president, customer relations, P.O. Box 36647, Dallas, Tex. 75235-1647; telephone 214-792-4223.

* TWA: www.twa.com/about_twa /at_custserv.html

Complaints and plan requests to: Staff Vice President, Customer Relations, 1415 Olive St., St. Louis, Mo., 63103; 314-589-3600.

* United: www.ual.com/airline/default .asp?section=Commitment.asp&Sub Category=Our_Company&destination _URL=/airline/Our_Company/Commit ment.asp

Complaints or plan requests to Customer Relations, P.O. Box 66100, Chicago, Il. 60666; telephone 847-700-6796.

* US Airways: www.usairways.com /travel/passinfo /commit/letter.htm

For complaints or plan copies, contact Consumer Affairs Director Deborah Thompson, P.O. Box 1501, Winston Salem, N.C. 27102-1501; telephone 336-661-0061.

Aviation Consumer Protection Division

U.S. Department of Transportation

C-75, Room 4107

400 Seventh St. SW

Washington, D.C. 20590

202-366-2220; airconsumer@ost.dot.gov

Sen. John McCain

Committee on Commerce, Science and Transportation

254 Russell Senate Office Building Washington, D.C. 20510

202-224-4852; senator_mccain@mccain.senate.gov

Complaints also may be logged on the Web site www.passengerrights.com. Specify that your complaint is related to an airline's service commitment.