# STC SA112NW

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Alaska Airlines Inc, United States
- Description: Installation of cabin interior arrangement. (720 -22)
- Status date: February 26, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A28](https://openairdocs.org/tcds/4A28)
- Certificate PDF: https://openairdocs.org/files/sha256/04/e8/04e85ef76bd75352af045e9b876c7fd766873a24eeefef74d44f1a5c2ad70e77
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0DB8BE32156D60C5862577C9004887EF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA112NW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 720 ([TCDS 4A28](https://openairdocs.org/tcds/4A28))

## 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.

**AFFIDAVIT OF LOSS OF CERTIFICATE**

**STATE OF WASHINGTON**

COUNTY OF KING I,Joseph S. Nolan, being first duly sworn, depose and say:

That Alaska Airlines isthe holder of Supplemental Type Certificate No.

SA112NW (Installation of the cabin interior of a Boeing 720-22 series aircraft);

That Alaska Airlines no longer possesses said Certificate;

That Iam submitting this affidavit in lieu of said Certificate;

Ideclare under penalty of perjury that the foregoing istrue and correct;

That, ifat any time Alaska Airlines finds this Supplemental Type Certificate, Iwill surrender the same immediately to the Office of Regional Counsel, Northwest Mountain Region, Federal Aviation Administration, 1601 Lind Avenue S.W., Renton, Washington 98057-3356.

Director, Fleet Engineering SUBSCRIBED AND SWORN TO before me this ~day of July, 2008.

vrtUiU.5.~ otary Public in and for the State of Washington, residing at ~, tU4- My Commission expires on:

7n&; 1,;2{)( (

## Every issue (1)

- February 26, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/04/e8/04e85ef76bd75352af045e9b876c7fd766873a24eeefef74d44f1a5c2ad70e77)

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