STC SA3591WE-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate &RRENDEREr • bertiticot on 6.26.2009 Number SA 3591 WE-D This certificate issued to: United Airlines, Inc.

Part 25 of the Federal Aviation Regulations: See T.C. Data Sheet A22WE.

Original Product - Typebentificate Number: A22WE Make: McDonnell Douglas Model: DC-10-10 Western Airlines Description of Type Design Change:

Installs new lavatory module/bustle assembly at Door 2 RH/LH, underfloor plumbing and related systems, modified main deck floor support structure, external service panel in accordance with United Airlines DAS-1-WE, sealed drawing list 3591 dated 3/20/79.

Limitations and Conditions: The approval of this change in type design applies basically to the McDonnell Douglas DC-10-10 airplane. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should in-.

clude consideration of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage.

Date of Application: January 2, 1979 Date Reissued:

Date of Issuance: . March 20, 1979 Date Amended: September 11, 1979 FEDERAL AVIATION By Direction of the Administrator 4. 77 2ate

•N. avior d (Signature ) * MINIST RATIO United Airlines DAS Coordinator, DAS-1-WE (Title)

47.