# STC SA421NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Plattner, LLC
- Description: Removal of passenger configuration interior items and installation of a cargo door. (DC-8-51 SN 45648 only) (DC-8-21 SNs 45422-45427, 45429-45431, 45433-45437 only)
- Status date: June 9, 1999
- Data sheets: 4A25, 4A25, 4A25, 4A25
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C39BAB01A24FFFA485256CC2000E3A97.0001
- Page: https://openairdocs.org/stc/SA421NW

## ADs that name it

- [AD 2001-26-04](https://openairdocs.org/ad/2001-26-04): Main Deck Cargo Door Structure and Fuselage Structure · Cargo door, cargo restraint bulkhead, heavy duty flooring… (Plattner STC SA1802SO or SA421NW). Effective Jan 30, 2002. Named in the applicability
- [AD 2000-09-01](https://openairdocs.org/ad/2000-09-01) (historical): Main Deck Cargo Door · McDonnell Douglas DC-8 Series with STC SA1802SO or SA421NW. Effective Jun 7, 2000. Named in the applicability
- [AD 93-20-02](https://openairdocs.org/ad/93-20-02) (historical): AFM Changes - Cargo Door Inspection · Cargo door, cargo restraint bulkhead, heavy duty flooring… (Plattner STC SA1802SO or SA421NW). Effective Nov 17, 1993. Named in the applicability

## Approved models (4)

- McDonnell Douglas Corporation DC-8-21 (TCDS 4A25)
- McDonnell Douglas Corporation DC-8-32 (TCDS 4A25)
- McDonnell Douglas Corporation DC-8-33 (TCDS 4A25)
- McDonnell Douglas Corporation DC-8-51 (TCDS 4A25)

---
From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.