What it approves
Installation of Pratt & Whitney (UACL) PT6A-27 turboprop engine and Hartzell HC-B3TN-3D/T10178CH reversible propeller
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.
SA1481CE Helio Alaska, Inc.
20150 Birchwood Spur Rd.
Chugiak, AK 99567 Part 3 the Civil Air Regulations A4EA Helio HST-550 (S/N 1 Only) Installation of Pratt & Whitney (UACL) PT6A turboprop engine and Hartzell HC-B3TN-3D/T10178CH reversible propeller. Data Required: (1) A copy of this certificate; (2) Brent/Helio Drawing 550-080-9000 (Sheet 2 of 4) and Brent Report and Drawings B550-F1; and (3) Airplane Flight Manual Supplement dated March 30, 1979, or later FAA approved revision.
(See Continuation Sheet 3 of 3) March 20, 1978 December 5, 2006; September 12, 2012; October 18, 2012;
August 30, 2024 March 30, 1979 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3
SA1481CE 3
SA1481CE Date of Issuance: March 30, 1979 Date of Reissuance: August 30, 2024
(1) Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval limited to the installation made in Helio HST-550, Serial Number 1 only.
(2) 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.
-END- 3 3
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 1
| Make | Model | Data sheet |
|---|---|---|
| Helio Aircraft LLC | HST-550 | A4EA |
Every issue · 4
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| August 30, 2024 | Reissued, current | Certificate |
| October 18, 2012 | Reissued, earlier issue | Certificate |
| September 12, 2012 | Reissued, earlier issue | Certificate |
| December 5, 2006 | Reissued, earlier issue | Certificate |