STC SA3410NM

This Certificate issued to AIRWELD, INCORPORATED 8167 Belvedere Avenue, Suite D Sacramento, California 95826

Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number A23WE Make : Lockheed Model : L-1011-385-3 Description of Type Design Change: Installation of Winters airstair Model AS10108-5 in accordance with FAA approved Winters Drawing List Number 52601100, Re vision “AN”, dated August 23, 1986, or later FAA approved revision.

Limitations and Conditions: This approval should not be extended to othe r 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 appr oved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight of the fuselage. If the holder agrees to permit another person to use this cer tificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application : December 14, 1984

Date of issuance : August 27, 1986

Date reissued : November 2, 1988; July 16, 1997; January 5, 2000; December 3, 2001; April 28, 2008

( Signature) Mansour Rafat Manager, Cabin Safety/Mechanical & Environmental Systems Branch Los Angeles Aircraft Certification Office (Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Number and street)

(City, State, and ZIP Code)

from (Name of grantor) (Print or type)

(Address of grantor) (Number and street)

(City, State, and ZIP Code)

Signature of grantor (In ink):

U.S. GPO 1987-763-289