# STC SP00574SE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: SMR Technologies, United States
- Description: Installation of SMR Technologies electrothermal propeller deicer P/N SMR6890 as a replacement for Safeway electrothermal propeller deicer P/N Safeway 6890 (R.333 /4-82-F/12)
- Status date: March 15, 2002
- Product: Propeller
- Certification basis: Part 21
- Data sheets: [TCDS P61GL](https://openairdocs.org/tcds/P61GL)
- Certificate PDF: https://openairdocs.org/files/sha256/cd/6b/cd6bb3edd6d517db5ee00b287069a599936e9593cf2d8dce42efe144f4b1283e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5F6A73E062C3438785256CC2006223EB.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SP00574SE

## ADs that name it (0)

None.

## Approved models (1)

- Dowty Rotol Ltd. R.333 ([TCDS P61GL](https://openairdocs.org/tcds/P61GL))

## 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.

Number SP00574SE This certificate, issued to: SMR Technologies 1778 West State Route 224, Suite A Tiffin, OH 44883

Part 35 of the Federal Aviation Regulations.

Original ProductType Certificate Number: P61GL Make: Dowty Rotol Model: R333/4-82-F/12

Description of the Type Design Change: Installation of SMR Technologies electrothermal propeller deicer P/N SMR6890 as a replacement for Safeway electrothermal propeller deicer P/N Safeway 6890 in accordance with Drawing List DL-SMR6890, Rev. C, dated May 8, 1998, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to above model propellers only. This approval should not be extended to other propellers 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 will produce no adverse effect upon the airworthiness of those propellers. A copy of this Certificate must be maintained as part of the permanent records for the modified propellers.

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.

This certificate and the supporting data which is the ba sis for approval shall remain in effect until surrendered, suspended, revoked, or a termination date is ot herwise established by the Administrator of the Federal Aviation Administration.

Date of application: October 13, 1997 Date reissued: May 4, 2000

Date of issuance: September 2, 1998 Date amended:

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- May 4, 2000: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/cd/6b/cd6bb3edd6d517db5ee00b287069a599936e9593cf2d8dce42efe144f4b1283e)

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