# STC SA8821SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Vallejo Investments Inc., United States
- Description: Installation of two Acme Fiber-Nickel Cadmium Standby Battery Systems.
- Applied: April 13, 1993
- Status date: August 17, 2007
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/83/e0/83e0d2161fe206a4d444f1341cc5e3c5ee95344dc68d5b5577411216bc2d69e6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/52050F8257A8219186257356005CFE63.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8821SW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-100 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 Vallejo Investments, Inc.

One Embarcadero Center, Suite 1050 San Francisco, CA 94111 Part 4b of the Civil Air Regulations.

A3WE

Boeing

727-100 Description of Type Design Change:

Installation of two Acme Fiber-Nickel Cadmium Standby Battery Systems in accordance with Comtran International Incorporated, drawing list 93-0012-12 Rev. B, dated May 24, 1994, or later FAA approved revision.

FAA approved Comtran International Flight Manual Supplement dated May 14, 1994, or later FAA approved revision required. Compatibility of this modification with previously installed equipment must be determined by installer. A copy of this STC must be included in the permanent records of the modified aircraft. I 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 : April 13, 1993

Date of issuance : May 14, 1994

Date reissued : August 16, 2000; November 17, 2000;

August 17, 2007

( Signature) Manager, Technical & Administrative Support Staff, 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.**

Number

-END-

## Every issue (1)

- August 17, 2007: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/83/e0/83e0d2161fe206a4d444f1341cc5e3c5ee95344dc68d5b5577411216bc2d69e6)

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