# STC SA2612SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Install dual wiring provisions. Install a single Litton LTN-201 ONS or LTN-211 ONS.
- Applied: October 4, 1977
- Status date: April 30, 1987
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A22WE](https://openairdocs.org/tcds/A22WE)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/9e/1f9ef663aa55c67f7261106e3cbceffb900a42bdb3eadfb5702089830beb01fa
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/044399BBA0D6080285256CC20008C674.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2612SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company DC-10-10 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE))
- The Boeing Company DC-10-30 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE))

## 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.

ttmtrd £tatra of amtrita ©epartment of tansportation — federal SKriarion administration oippltmental ICjp Certificate SA2612SW-D American Airlines, Inc.

Maintenance & Engineering Center Tulsa, Oklahoma 74151 25 </^<^- Federal

- t3rt4t<ft<a£' :

Aviation A22WE McDonnell Douglas DC-10-10 Install dual wiring provisions in accordance with ARINC 580/599, ECO R2847 Rev. A dated 11/21/77, and ECO R3111 Rev. A dated 6/18/80.

Install a single Litton LTN-201 ONS or LTN-211 ONS approved under TSO C94 in accordance with ECO's R2847 Rev. B thru G dated 3/28/78, 7/28/78, 9/18/78, 2/16/79, 3/20/79, and 9/26/79 respectively, and in accordance with the general guidelines as outlined in AC120-37. (Continued) jhi s approval shoul d not be incorporated in any aircraft of this specific model on which other approved modifications are incor porated, unless it is determined that the interrelationship between tnis_ change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the aircraft.

(Continued) .

October 4, 1977 ?/,,&• „**„,,/ November 2, 1977 ^«& „„„,„/„/ 4/30/87 (Continued on Page 3) /I u-dtrff/'fti '•/ /Ar .^'/f/frie.ni^/ffi/i- { Signatwf ) DAS-1SW Coordinator (Ttllt) (J_w*>

$TC$3 Tha certiji(ale may bt transferred in acwdance ivilh FAR 21A7.

FJkA fo«M SI 10-2 (10-6B)

Hntad gtattB of Smerica Bepartmcnt of transportation— fcfltral aviation administration >upplemental Itjp Certificate(Continuation ghat) sA26i2sw-oDescription ojf Type Design Change (Continued)

3. Install a single or dual Litton LTN-211 ONS/VLF system approved under ISO C94 in accordance with ECO R2847 Rev. K, N and P dated 8/31/80, 12/19/30, and 2/16/81, respectively, or ECO R4047 dated 11/25/83 in accordance with the general guidelines as outlined in AC 120-37.

4. Relocate Ho. I and No. 2 LTN-211 ONS/VLF system antenna in accordance with ECO R3230 dated 8/7/81 following the guidelines as outlined in AC 120-37,

5. Replace LTN-211 ONS/VLF system containing computer program No. 211-32-02 with system containing computer program No. 211-34-00 in accordance with ECO R3236 dated August 21, 1981.

6. Install a dual LTN-211 ONS/VLF system in OC-10-30 airplanes containing computer program No. 211-34-00 in accordance with ECO R2990 Rev. G, ECO R3230 Rev. D, and in accordance with the general guidelines as outlined in AC120-37.

7. Replace LTN-211 ONS/VLF system containing computer program No. 211-34-00 with system containing computer program No. 211-34-02 in accordance with ECO R3343A dated June 22, 1983.

8. Replace LTN-211 ONS/VLF system containing computer program No. 211-34-02 with system containing computer program No. 211-34-03 in accordance with ECO R3343B dated November 7, 1984.

9. Replace LTN-211 and VLF system containing computer program No. 211-34-04 with system containing computer program No. 211-34-05 in accordance with ECO R3343C dated November 6, 1986.

10. Replace existing ARINC-599 antenna coupler unit with a mini-antenna coupler unit in accordance with ECO R3525A dated January 9, 1987.

Limitations and Conditions (Continued) No INS navigation equipment may be installed on Captain's side of the cockpit.

Litton LTN-211 ONS with computer program No. 211-11-02 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 2A dated May 9, 1980, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

Litton LTN-211 ONS/VLF system with computer program No. 211-32-00 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 2B dated October 17, 1980, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

FAA FORM Biio-2-1 (in-69) This califcati may be transferred in accordance with FAR 21.47.

**PAGE 2OF 3PAGES C FAA AC 73-2651**

United £>tatts of amcrira Bepartmcnt of ^Transportation— Jfedtrai aoiation administration supplemental HCgpe Certificate(Continuation 3heet) SA2612SU-D Limitations and^ Comlitiqris (Continued) Litton LTN-211 ONS/VLF system with computer program No. 211-32-02 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 2C dated February 26, 1981 for DC-10-10 airplanes, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

Litton LTN-211 ONS/VLF system with computer program No. 211-34-00 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 20 dated November 25, 1981 for OC-10-10 airplanes or FAA approved American Airlines, Inc. AFM Appendix XXXVI, Supplement 1 dated October 16, 1982 for DC-10-30 airplanes, and is approved in accordance with the accuracy requirements as outlined In AC120-33.

Litton LTN-211 ONS/VLF system with computer program No. 211-34-02 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 2E dated September 23, 1983 for OC-10-10 airplanes, or FAA approved American Airlines, Inc. AFM Appendix XXXVI, Supplement 1A dated September 23, 1983 for DC-10-30 airplanes, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

Litton LTN-211 ONS/VLF system with computer program No. 211-34-03 211-34-04 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 2F dated January 4, 1985 for DC-10-10 airplanes, or FAA approved American Airlines, Inc. AFM Appendix XXXVI, Supplement IB dated January 4, 1985 for DC-10-30 airplanes, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

Litton LTN-211 ONS/VLF system with computer program No. 211-34-05 requires FAA approved American Airlines, Inc. AFM Appendix IVA, Supplement 26 dated November 25, 1986 for DC-10-10 airplanes, or FAA approved American Airlines, Inc. AFM Appendix XXXVI, Supplement 3 dated November 25, 1986 for DC-10-30 airplanes, and is approved in accordance with the accuracy requirements as outlined in AC120-33.

Date Amended;

4/22/78, 8/15/78, 5/2/79, 9/14/79, 4/3/80, 5/9/80, 9/29/80, 10/17/80, 2/3/81, 2/26/81, 9/4/81, 10/2/81, 11/25/81, 10/16/82, 9/23/83, 2/22/84, 1/4/85, 11/25/86.

FAA FORM eilO-2-1 (10-69) PAGES °F3 PAGES C FAA AC 73-2651

TRANSFER ENDORSEMENT 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 £ street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In infc):

## Every issue (1)

- April 30, 1987: Amended, Current. [certificate](https://openairdocs.org/files/sha256/1f/9e/1f9ef663aa55c67f7261106e3cbceffb900a42bdb3eadfb5702089830beb01fa)

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