# STC SA3515NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Rockwell Collins Inc., United States
- Description: Installation of new lavatory drain valves in the forward and aft lavatory drain system in accordance with Kaiser Electroprecision Installation Procedure RYY 104-053, Revision B, dated May 23, 1986, or later FAA approved revision.
- Applied: April 14, 1986
- Status date: November 17, 2011
- Product: Aircraft
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/52/f6/52f66bd47be87f5b950fd6c6ab092c37de0fd5393a2004fe7d3df5097161c3bc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/259DCD15DEA1E2B9862579890064C99F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3515NM

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- 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 Rockwell Collins, Inc.

2642 Michelle Drive Tustin, CA 92780 Part 25 of the Federal Aviation Regulations.

A3WE Boeing 727, -100, -200 Description of Type Design Change: Installation of new lavatory drain valves in the forward and aft lavatory drain system in accordance with Kaiser Electroprecision Installation Procedure RYY 104-053, Revision B, dated May 23, 1986, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft. A copy of this certificate and the FAA approved Kaiser Electroprecision Installation Procedure RYY 104-053 must be maintained as part of the permanent records for the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: April 14, 1986

Date of issuance: June 26, 1986

Date reissued: January 5, 2006; June 29, 2006;

November 17, 2011

( Signature)

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

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

## Every issue (2)

- November 17, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/52/f6/52f66bd47be87f5b950fd6c6ab092c37de0fd5393a2004fe7d3df5097161c3bc)
- January 5, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/45/31/453128a9ef0066dacdffc689b772cfd8eec3d17b37a433792aba119aaa93c549)

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