# STC SA7053NM

- Type: Supplemental type certificate
- Status: Historical, Surrendered
- Holder: Hollingsead International, United States
- Description: Installation of lavatory smoke detection system.
- Applied: July 29, 1993
- Status date: June 19, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/4d/aa/4daa6bc32815b030f08d60aa6cbc7b906bf6616a33b3ccce5164d5b99b63c120
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A23987DA031CE263862575EC0067C74B.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7053NM

## ADs that name it (0)

None.

## Approved models (9)

- McDonnell Douglas Corporation DC-9-81 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-81 (MD-81) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-82 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-82 (MD-82) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-83 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-87 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-87 (MD-87) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation MD-88 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA7053NM This certificate issued to: Hollingsead International Certificate 2226 Goodyear Avenue SURRENDERED Ventura, CA 93003 on . 6-19-09 Part *25 of the * Federal Avialion Regulations. *Certification basis is set forth in Type Certification Data Sneet.

Original Product Type Cerlificate Number : AGWE Abake McDonnell Douglas Corporation Model DC-9-81 (MD81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88 Description of Type Design Change: Installation of Lavatory Smoke Detection System in accordance with FAA Approved Hollingsead International Master Data List No 10972, Revision "F", dated January 4, 1994, or later FAA Approved Revisions.

Limitations and Conditions: The approval of this installation applies only to the above noted airplane model series only. The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the 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.

Date of Application: July 29, 1993 Date Reissued: December 3, 1998, April 25, 2002, May 7, 2007 Date of Issuance: January 25, 1994 Date Amended: October 11, 1994 FEDERAL AVIATION By Direction of the Administrator Calt.- K. Woo (Signature) Manager, Technical & Administrative Support Staff TOMNISTRATIO Los Angeles Aircraft Certification Office

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 and street) (City, State, and ZIP Code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

* U.S. GPO 1987-763-289 Page 2 of 2

## Every issue (2)

- June 19, 2009: Surrendered, Historical. [certificate](https://openairdocs.org/files/sha256/4d/aa/4daa6bc32815b030f08d60aa6cbc7b906bf6616a33b3ccce5164d5b99b63c120)
- May 7, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a1/e4/a1e429f24b673c79713c4ba003670e724b31cad94eaf045e102d391e90e473d2)

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