# STC SA4321NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Timberman Allen E, United States
- Description: Installation of an oil filter, filter base and mounting plate on the firewalls of those airplanes listed on AML No SA4321NM that are equipped with an FAA approved Continental model IO-470 engine installation which has been modified by the installation of an external mounted full flow oil adapter and spin-on oil filter
- Applied: March 31, 1988
- Status date: July 30, 1993
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24), [TCDS 3A21](https://openairdocs.org/tcds/3A21), [TCDS 3A10](https://openairdocs.org/tcds/3A10), [TCDS 3A15](https://openairdocs.org/tcds/3A15), [TCDS 3A16](https://openairdocs.org/tcds/3A16), [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/37/70/37707f143edc5b6fdba949b1190bad9317d3b0e32fe9fb41a18d671063bf0bc3
- Approved model list and other attachments: [AML SA4321NM.pdf](https://openairdocs.org/files/sha256/ae/31/ae31d93cf733bed1c6ebf2840b0c4c81d4f6b8144d3d7c9e2cd1ba7cac51b946)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B6316DABE120E5BA85256CC2000E3B94.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4321NM

## ADs that name it (0)

None.

## Approved models (48)

- Cessna Aircraft Company 185 ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 185A ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 185B ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 185C ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 185D ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Cessna Aircraft Company 210 ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210-5 (205) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210-5A (205A) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210A ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210B ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210C ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210D ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210E ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 310C ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310D ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310E ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310F ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310G ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310H ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310I ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310J-1 ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310K ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310L ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310N ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company E310H ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company E310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Hawker Beechcraft Corporation 35-33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation 35-A33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation 35-B33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation 35-C33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation 95-55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Hawker Beechcraft Corporation 95-A55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Hawker Beechcraft Corporation 95-B55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Hawker Beechcraft Corporation 95-B55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Hawker Beechcraft Corporation 95-B55B ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Hawker Beechcraft Corporation E33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation F33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation G33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation H35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation J35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation K35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation M35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Hawker Beechcraft Corporation P35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Twin Commander Aircraft LLC 500-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1))

## 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: SA4321NM This certificate issued to: AlTen E. Timberman Purt * of the * Regulations:

Original Product -Typeberlificate Number: *See Attached Approved Model List (AML) Make: No. SA4321NM for list of approved airplane Model: models and applicable airworthiness regulations.

ein airse airpales listed on that quippin Installation of an oil filter, filter base and mounting with an FAA Approved Continental Model I0-470 engine installation which has been modified by the installation of an external mounted full flow oil adapter and spin-on oil filter in accordance with STC No. SE3517NM and Timberman Installation Instructions No. AT-2-10-470-II, revised March 30, 1988, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the aircraft models listed on AML No. SA4321NM, only. This approval should not be extended to aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and AML No. SA4321NM, dated September 16, 1988, or later FAA Approved revision must be maintained as part of the permanent records of the modified aircraft.

### AML SA4321NM.pdf

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

97045 September 16, 1988 AML AMENDMENT DATE Refer to Note "B" of Installation Inatructions No. 1T-2-I0-470-II, revised March 30, 1988 (or later FAA approved rev1sion) for oil hose line and fitting specifications. Those airplanes or powerplant installations approved under a certification basis dated on or after August 12, 1957 (Amendment 3-2 of CAR 3, dated 5/15/56), must be equipped with fire resistant o11 21560 S. Highway 213 Oregon City. Ore ENGINE MODELS IO-470-G IO-170-I, K IO-170-K IO-470-N IO-470-L (AML.) NO. SA4321NM INSTALLATION OF OIL FILTER, FILTER BASE, AND MOUNTING PLATE ON THE FIREWALL Issue Date: *OIL HOSES ELIGIBILITY 1E701 303 × FAA APPROVED HODEL FOR CERTIFICATION BASIS FOR ALTERATION CAR 3, Dated 5/15/56 and Amendment 3-8 CAR 3, Dated 5/15/56 and Amendment 3-0 CAR 3, Dated 5/15/56 and Amendment 3-8 CAR 3, Dated 5/15/56 and Amendment 3-8 CAR 3, Dated 5/15/56 Page 1 of 3 ORIGINAL TYPE CERTIFICATE NUMBER 3115 3115 3115 3115 ЗА16 AIRCRAFT MODEL J35, K35, 135 35-33, 35-133 35-033, 35-C33, E33, F33 N135, P35, G33 95-55, 95-155, 195-B55, |95-B55A, 195-B55B hoses and fittings.

**AIRCRAFT MAKE BEECH TEM**

September 16, 1988 AML AMENDMENT DATE lefer to Note "B" of Installation Instructions No. NT-2-I0-470-II, revised March 30, 1988 (or later FAA approved revision) for oil hose line and fitting specifications. Those airplanes or powerplant inatallations approved under a certification авів dated on or after uguat 12, 1957 (Amendment 3-2 of CAR 3, dated 5/15/56), must be equipped with fire reistant o1] 21560 S. Highway 213 Oregon City, Oregon ENGINE MODELS IO-470-F IO-470-E, S IO-470-D, U, V, VO (AML) NO. SA43211M INSTALLATION OF OIL FILTER, FILTER BASE, AND MOUNTING PLATE ON THE FIREWALL Isoue Date: *OIL HOSES ELICIBILITY ЛЕ701 303 FAA APPROVED HODEL L FOR CERTIFICATION BASIS FOR ALTERATION CAR 3 (Normal), Dated 5/15/56, and Amendments 13-1 thru 3-5; |FAR 21 (Rentricted), Dated 2/1/65 ICAR 3, Dated 5/15/56 CAR 3, Dated 11/1/19 and Amendments 3-1 thru 13-10 Page 2 of 3 ORIGINAL TYPE CERTIFICATE NUMBER 3124 3121 3110 AIRCRAFT AIRCRAFT MODEL MAKE л, В, 185, CESSNA C, D, E 210, 1, B, іс, 210-5, 1210-51 |310C, D, E, F, G, HI, E310Н, 310I, J, 310J-1, E310J, 310K, IL, N, P, Q noses and fittings.

'EM

045 September 16, 1988 AML AMENDMENT DATE Refer to Note "B" of Installation Instructiona No. AT-2-I0-470-II, revised March 30, 1988 (or later FAN approved revision Those airplanes or powerplant installations approved under a certification basis dated on or after August 12, 1957 (Amendments 3-2 of CAR 3, dated 5/15/56), must be equipped with fire resistant o1 Manager. Special Certification Branch Seattle Aircraft Certification Office ramberlan 21560 S. Highway 2'- Oregon City, Oregi ENGINE MODELS I0-470-M ArIen C. (AML) NO. S11321NM INSTALLATION OF OIL FILTER, FILTER BASE, AND MOUNTING PLATE ON THE FIREWALL IBaue Date: *OIL NOSES ELIGIBILITY 303 ЛЕ701 FAA Approved: ly 30, 1593 Revision Date: • FAA APPROVED MODEL FOR CERTIFICATION BASIS FOR ALTERATION CAR 3, Dated 5/15/56 and Amendments 3-3 and Page 3 of 3 3-4 ORIGINAL TYPE CERTIFICATE ! NUMBER 611

AIRCRAFT MODEL AIRCRAFT MAKE GULESTREAM 500 A AMERICAN hoses and fittings.

**ITEM**

## Every issue (1)

- July 30, 1993: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/37/70/37707f143edc5b6fdba949b1190bad9317d3b0e32fe9fb41a18d671063bf0bc3), [AML SA4321NM.pdf](https://openairdocs.org/files/sha256/ae/31/ae31d93cf733bed1c6ebf2840b0c4c81d4f6b8144d3d7c9e2cd1ba7cac51b946)

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