# STC ST326CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Technologies Corporation, Pratt & Whitney Division, United States
- Description: Installation of Nose Cowl Anti-Icing Elbow Assembly
- Applied: September 8, 1994
- Status date: July 29, 2014
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/fc/32/fc325a59c0164ed5283b9bc2252581030b28af67e2c49aba94df2fa01447422c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/18AC206A6E9D47B986257D4D0069F77A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST326CH

## ADs that name it (0)

None.

## Approved models (5)

- The Boeing Company DC-9-81 (MD-81) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-82 (MD-82) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-87 (MD-87) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company MD-88 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## 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.

FAA FORM 8110-2(10-68) PAGE 1 of 2 PAGES N umber ST326CH Reissued on July 29, 2014 to transfer to United Technologies Corporation, Pratt & Whitney Division.

This certificate issued to

certifies th at the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness requirements of Part 25 of the Federal Aviation R egulations.

(See Type Certificate Data Sheet No. A6WE for complete certification basis.)

Original Product --Type Certificate N umber: A6WE M ake: McDonnell Douglas M odel: DC-9-81, -82, -83, -87, and MD-88

Installation of Nose Cowl Anti-Icing Elbow Assembly manufactured per Tube Processing Corporation Top Drawing 2001-TP, Revision B, dated June 17, 1994, or later FAA approved revision in accordance with Douglas Aircraft Company Component Maintenance Manual, Part No. 5930645, Section 71-10-14, page 502E, dated May 1, 1992.

This approval should not be extended to other aircraft of this model on which other previously approved modification are incorporated unless it is determined by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

This certificate and the supporting data which is the b asis for approval shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the A dministrator of the F ederal A viation A dministration.

United Technologies Corporation Pratt & Whitney Division 400 Main Street East Hartford, CT 06118 Date of application : September 8, 1994

Date of issuance : April 12, 1995

Date reissued : February 25, 2011; July 17, 2014;

July 29, 2014

B y direction of the A dministrator Original Signed By:

Christopher Richards

(Signature) Timothy Smyth Manager, Propulsion and Program Management Branch Chicago Aircraft Certification Office

## Every issue (3)

- July 29, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fc/32/fc325a59c0164ed5283b9bc2252581030b28af67e2c49aba94df2fa01447422c)
- July 17, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6d/7e/6d7efe92005da8409e28b314b7731b22703096f7294b7767e536730f1f2256a1)
- February 25, 2011: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6d/2b/6d2b6b8489b4f7e49b39284f3e8b42b6a72d93c3e53d3f2ab1715cb355c9d2ea)

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