# STC SA4228NM-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: SBC-America LLC, United States
- Description: Installation of a lower lobe cargo handling system
- Applied: May 16, 1994
- Status date: January 1, 2023
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A2NM](https://openairdocs.org/tcds/A2NM)
- Certificate PDF: https://openairdocs.org/files/sha256/0b/1b/0b1b201a48f7d95bfb5e3d49e00ef4bf3ac34ec82f7f014d67a2e110138b19d5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137779343020230809194644.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4228NM-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 757-200 Series ([TCDS A2NM](https://openairdocs.org/tcds/A2NM))

## 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.

SA4228NM-D SBC-America, LLC 2959 Saratoga Rd Langley, WA 98260 25 the Federal Aviation Regulations A2NM Boeing 757-200 Installation of a lower lobe cargo handling system in accordance with Air Cargo Equipment company Master Drawing List (MDL) DL-DSY4900, Revision A, dated November 2, 1994, or later FAA approved revisions.

This aprpoval should not be incorporated in any certificated product of this model on which other approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those previously incorporated modifications will not introduce any adverse effect upon the airworthiness of the certificated product. A copy of this STC must be included in the permanent records of 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.

May 16, 1994 May 23, 1995; June 28, 2000; March 9, 2005; October 12, 2007;

Jauary 1, 2023 November 3, 1994 November 15, 1994; November 22, 1994; January 1, 2023 for Manager, West Certification Branch

SA4228NM-D

## Every issue (3)

- January 1, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0b/1b/0b1b201a48f7d95bfb5e3d49e00ef4bf3ac34ec82f7f014d67a2e110138b19d5)
- October 12, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/ca/96/ca9696a55e79085331dfe752e9cfb10d520a7fab4e1388b24b4d6742cc4f6232)
- March 9, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/95/9f/959f13ce8fbfa1b9882197485fdc66c37ee52af25a76a07c161b7cdcb750aef1)

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