# STC SA1335NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation of an engine power trim system - Applied: June 17, 1981 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE) - Certificate PDF: https://openairdocs.org/files/sha256/22/be/22beb31c93913424f489339dd03a547c27c855d7d1aea7bc8b54bc6aef9759f9 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F5F2981DB7F007D9862579970069D58D.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA1335NM ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. This Certificate issued to United Air Lines, Inc. 600 Jefferson Street Houston, Texas 77002 Part 4b* of the Civil Air Regulations. *Certification basis is set forth on Type Certificate Data Sheet A3WE. Original Product Type Certificate Number : A3WE Make: Boeing Model: 727-222A Description of Type Design Change : Installation of an engine power tr im system in accordance with FAA Approved United Air Lines Report F-1953 Revision A, dated March 22, 1982, or later FAA approved revisions. Limitations and Conditions: This approval should not be extended to ot her aircraft of this model on which other previously approved modificati ons 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. A copy of this STC must be included in the permanent records of the modi fied aircraft. If the holder agrees to permit another person to use this certificate to a lter the product, the holder shall give the other person written evidence of that permission. Refer to continuation sheet on page 3. Date of application : June 17, 1981 Date of issuance : April 16, 1982 Date reissued : November 30, 2011 Date amended : September 30, 1982, July 21, 1983 March 7, 1983 ( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff 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 1987-763-28 Number SA1335NM Limitations and Conditions: (Continued) The following limitations and conditions apply: 1) The engine power trim system is not to be engaged during takeoff, descent, final approach or go-around. EPR values displayed while in either the Maximum Continuous or Takeoff mode are advisory only and are not to be used in lieu of AFM charted values. 2) The engine power trim system is approved for use with Pratt & Whitney model JT8D-15 engines only, unless FAA approval is indicated for other engine models. 3) The safe life limit of the P/N 2022790-1 and -2 engine power trim system gear box is limited to 25,000 hours. Extension of this limit may be accomplished by FAA approved data only. Amendment Listing April 16, 1981 (I) Issued September 30, 1982 (A) Added Revision A to Report F-1953 dated June 15, 1982. July 21, 1983 (A) Revised EPTS Gearbox safe life limit from 3,000 hrs. to 25,000 hrs. March 7, 1983 (A) Added approval of P/N 2022790-2 engine power trim system gearbox. ---End--- ## Every issue (1) - November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/22/be/22beb31c93913424f489339dd03a547c27c855d7d1aea7bc8b54bc6aef9759f9) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.