# STC SE4-1638

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: TALCO Aviation, United States
- Description: Installation of one Roto-Master Turbocharger Model No. 3DT5FF10J2, P/N 600572-00 (formerly Rajay Model No. 315F10, P/N RJ0080-100, -101, or -102).
- Applied: February 2, 1959
- Status date: August 31, 2023
- Product: Engine
- Data sheets: [TCDS E-274](https://openairdocs.org/tcds/E-274)
- Certificate PDF: https://openairdocs.org/files/sha256/68/ff/68ff5009d37f40a82641385f2d1a82b35f81d0665339c84317fafd0109282bd1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184041584920231116141537.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE4-1638

## ADs that name it (0)

None.

## Approved models (2)

- Textron Lycoming AVCO Corporation O-320-A Series ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Textron Lycoming AVCO Corporation O-320-B Series ([TCDS E-274](https://openairdocs.org/tcds/E-274))

## 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.

SE4-1638 TALCO Aviation 3015 E. New York St, STE A2-270 Aurora, IL 60504 Part 13 the Civil Air Regulations E-274 Lycoming O-320-A and -B Series Installation of one Roto-Master Turbocharger Model No. 3DT5FF10J2, P/N 600572-00 (formerly Rajay Model No. 315F10 P/N RJ0080-100, -101, or -102) in accordance with FAA sealed Roto-Master (formerly Rajay) Drawing List RJ0199, Revision "A", dated 5/24/83 or later, FAA approved revision.

(See continuation sheet 3 of 4) February 2, 1959 1/10/64, 1/14/69, 2/10/82, 10/30/87, 9/22/95, 1/16/04, 6/26/06, 3/16/07, 3/12/18; 2/2/2021; 8/31/2023 December 5, 1961 May 1, 1962, July 15, 1983 for Paul (Vu) Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 4

SE4-1638 4

SE4-1638 Date of Issuance: December 5, 1961 Date Amended: July 15, 1983 Date of Reissuance: August 31, 2023

This approval covers engine/turbocharger compatibility only. See below for Engine Operating Limitations. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

**ENGINE OPERATING LIMITATIONS**

Where applicable, the following engine limitations supersede those specified on Engine Type Certificate Data Sheet E-274-7.

Engine Speed (Turbosupercharged)

Maximum - 2400 RPM

Minimum - 2200 RPM

Manifold Pressure (Turbosupercharged)

Maximum - 28.0 in. Hg.

Cylinder head temperature (Maximum)

Unsupercharged - 500 deg. F.

Turbosupercharged - 475 deg. F.

SE4-1638 Date of Issuance: December 5, 1961 Date Amended: July 15, 1983 Date of Reissuance: August 31, 2023

Fuel

Model O-320-A - minimum grade aviation - 91/96 octane

Model O-320-B - minimum grade aviation - 100/130 octane

Altitude

Maximum - 20,000 ft.

Minimum - 5,000 ft.

Fuel pressure

Green arc .5 psi to 5.0 psi with red lines at .5 psi and 5.0 psi. Additional green arcs from 1 psi to 13 psi with red lines at 1 psi and 13 psi with note "Turbo Range See Placard".

Engine and Turbocharger Operation

Do not operate the turbosupercharger unless the throttle is wide open.

When increasing power, fully open the throttle, and then slowly close the wastegate until desired power setting is obtained. When decreasing power, fully open wastegate, then close the throttle. The mixture control must be in full rich position for all turbosupercharged operation.

-END- 4 4

## Every issue (4)

- August 31, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/68/ff/68ff5009d37f40a82641385f2d1a82b35f81d0665339c84317fafd0109282bd1)
- March 5, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a7/0c/a70ce4ae2be72b51ced2a738cd1138647c5233605b1a910d51d6e9bad46250c1)
- June 26, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/c4/41/c441b1113be8bf44814f7bb40f4afaf9b4f0521e0fb8eb712e2bc50f8d06f50c)
- January 16, 2004: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f0/7c/f07cb35943f850f09417a7148f0ddcf8d393cc23344cb866495b8fe7a720bd4e)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.