What it approves
Install 170 hp Lycoming O-340-A1A engine and Hartzell HC-82XL-1DB/8433-12 propeller according to Doyn data listed on Engineering Releases 100 (3/22/58), 1010 (3/16/57), 1011 (8/28/57), 1012 (7/15/57), 1014 (3/30/57), 1050 (7/13/57), 1051 (& DCN 1, 12/10/57), 1052 (7/19/57), 1053 (7/19/57), 1099 (3/22/58), and Instructions (2 sheets, undated) Data required for parts manufacture: As listed on Engineering Releases 1001 (1/18/57), 1002 (12/21/57), 1003 (5/1/57), 1004 (7/13/57), 1005 (7/12/57), 1006 (3/30/57), 1007 (4/12/57), 1008 (2/27/57), 1009 (10/23/57), 1015 (2/25/56).
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
This certificate issued to
Part 3 of the Civil Air Regulations.
Install 170 hp Lycoming O-340-A1A engine and Hartzell HC-82XL-1DB/8433-12 propeller according to Doyn data listed on Engineering Releases 100 (3/22/58), 1010 (3/16/57), 1011 (8/28/57), 1012 (7/15/57), 1014 (3/30/57), 1050 (7/13/57), 1051 (& DCN 1, 12/10/57), 1052 (7/19/57), 1053 (7/19/57), 1099 (3/22/58), and Instructions (2 sheets, undated) Data required for parts manufacture: As listed on Engineering Releases 1001 (1/18/57), 1002 (12/21/57), 1003 (5/1/57), 1004 (7/13/57), 1005 (7/12/57), 1006 (3/30/57), 1007 (4/12/57), 1008 (2/27/57), 1009 (10/23/57), 1015 (2/25/56).
FAA Approved Airplane Flight Manual Supplement dated 12/11/56 is required for Model 170A landplane and skiplane, or dated 1/23/57 for 170A or 170B landplane or skiplane; or dated 6/7/57 for Model 1708 seaplane.
Compatibility of this modification with other previously approved modifications must be determined by the installer.
D’Shannon Products, Ltd.
1309 County Road 134 Buffalo, MN 55313 799 Make : Cessna Model : 170A, 170B Date of application :
Date of issuance : December 31, 1956
Date reissued : 1/29/57; 8/23/57; 1/25/66; 5/17/78; 5/12/11;
7/14/11
( Signature) Melvin D. Taylor Manager Atlanta Aircraft Certification Office
( Title)
ADs that name this STC · 2
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 2
Every issue · 2
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| July 14, 2011 | Reissued, current | Certificate |
| May 12, 2011 | Reissued, earlier issue | Certificate |