# STC SA4406NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries Ltd., United States
- Description: Installation of Pratt & Whitney JT15D-4 engines including minor aircraft modifications.
- Applied: January 16, 1982
- Status date: July 31, 2017
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A27CE](https://openairdocs.org/tcds/A27CE)
- Certificate PDF: https://openairdocs.org/files/sha256/a5/ef/a5ef006d85e7946cebc8158bd29b90cc4d91a3c4b50e87385d5129013d085de1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/458291BDDCFD56D286258721004C31FE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4406NM

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. 501 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 4

Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced.

Number: SA4406NM

Part 23 of the Federal Aviation Regulations. See Data Sheet A27CE

Original Product – Type Certificate Number: A27CE Make: Cessna Model: 501

Installation of Pratt & Whitney JT15D-4 engines including minor aircraft modifications in accordance with Aircraft Technical Service, Inc. FAA sealed Master Drawing List No. 1960, Revision “J”, dated March 1, 1982, or later FAA approved revision. Century Aircraft Corporation FAA Approved Airplane Flight Manual for Century V Eagle Cessna Model 501SP, dated December 21, 1982, or later, approved revisions are required with this installation.

Date of Application: January 16, 1982 Date Reissued: 3/23/82; 7/14/99; 7/21/05; 7/31/17 Date of Issuance: March 17, 1982 Date Amended: December 23, 1982

Signature

Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd.

122 Howard Langford Drive Uvalde, TX 78801

FAA Form 8110-2 (5/14) Page 2 of 4

Transfer the ownership of Supplemental Type Certificate Number: SA4406NM

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4406NM

FAA Form 8110-2 (5/14) Page 3 of 4

Date of Issuance: March 17, 1982 Date Amended: December 23, 1982 Date of Reissuance: July 31, 2017

The approval of this change in type design applies to Cessna Model 501 with Eagle modification STC SA732NM only.

This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of the other previously approved modification will introduce no adverse effect upon the airworthiness of th e above listed airplanes.

The limitations listed in Type Certificate Data Sheet No. A27CE are applicable except as follows:

Engines: Two Pratt & Whitney Aircraft of Canada, Ltd.

JT15D-4 turbofans

Engine Limits: Static thrust standard day, sea level:

Takeoff (5 min.) 2500 lb.

Max. Continuous 2375 lb.

Max. permissible engine rotor operating speeds:

N1 (Fan) JT15D-4 104 percent 16,540 RPM N2 (Gas Gen.) 96 percent 31,450 RPM

Oil Pressure:

Minimum 61 percent N2 and above 70 psig Below 61 percent N2 35 psig Maximum 85 psig

Oil Temperature:

Maximum 121°C Minimum -40°C Maximum Transient 130°C (90 seconds)

Airspeed Limits (CAS): VMO (Maximum Operating Sea Level to 28,000 ft.) 260 knots VA (Sea Level) 12,500 lb. 185 knots

Maximum Weight: Takeoff 12,500 lbs.

Landing 11,350 lbs.

Zero Fuel 9,500 lbs.

Ramp (Taxi) 12,500 lbs.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4406NM

FAA Form 8110-2 (5/14) Page 4 of 4

Date of Issuance: March 17, 1982 Date Amended: December 23, 1982 Date of Reissuance: July 31, 2017

Fuel Capacity (Gal.): Two wing tanks: Total 338 each; usable 334 each Arm = +255.5 in.

Oil Capacity (Gal.): Two engine mounted tanks: Total 2.08 each;

Usable 1.50 each Arm = +322.0 in.

Maximum Generator Loads: Ground: 300 amps Flight: S.L. to 35,000 ft. 350 amps 35,000 ft. and up 325 amps

Maximum Operating 43,000 ft.

Altitude:

-END-

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4406NM

FAA Form 8110-2 (5/14) Page 5 of 4

## Every issue (2)

- July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a5/ef/a5ef006d85e7946cebc8158bd29b90cc4d91a3c4b50e87385d5129013d085de1)
- July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/2a/3d/2a3d2a79696f4eeda9ba7e3ab53461ca14ccf970359c92d9d9de160cea5ab425)

---
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.