STC SP00570SE

Number SP00570SE This certificate, issued to: SMR Technologies 1778 West State Route 224, Suite A Tiffin, OH 44883

certifies that the change in the type design for the follo wing product with the limitations and conditions therefor as specified hereon meets the airw orthiness requirements of Part 35 of the Federal Aviation Regulations.

Original ProductType Certificate Number: P906 Make: Hamilton Standard Model: 54H60

Description of the Type Design Change: Installation of SMR Technologies electrothermal propeller deicer P/N SMR7158412 as a replacement for Safeway electrothermal propeller deicer P/N Safeway 715841SW in accordance with Drawing List DL-SMR715841, Rev. B, dated April 30, 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: August 27, 1998 Date amended:

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