What it approves
Replace the o-ring seals in the landing gear lower strut seal.
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.
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Original Product 7\SH&HUWLILFDWH1XPEHU Make:
SA8408SW Metrea Special Aerospace, ISR Inc.
1100 N. Broadway Ave, Suite 200 Oklahoma City, OK 73103 Part 3 Civil Air Regulations 2A4 Twin Commander 560F, 680F(P), 680FL, 680FL(P), 680T/V/W, 681, 685, 690/A/B/C/D, 695/A/B Replacement of O-ring Seals in the landing gear, lower strut seal. Data required:
1. Gulfstream Aerospace Technologies Drawing List No. GSDL-001, Rev. IR, dated April 24, 1992, and
2. Gulfstream Aerospace Technologies Installation Instructions No. GSI-001, Rev. IR, dated April 24, 1992, or later FAA Approved revisions for 1 or 2.
Compatibility of this design change with previously approved modifications must be determined by the installer.
November 1, 1991 September 14, 1998, April 29, 2025 July 17, 1992 October 13, 1992 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2
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Too (Name and address of transferee):
Date oI transfer:
SA8408SW 2
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 17
| Make | Model | Data sheet |
|---|---|---|
| Twin Commander Aircraft Corporation | 560-F | 2A4 |
| Twin Commander Aircraft Corporation | 680-F(P) | 2A4 |
| Twin Commander Aircraft Corporation | 680-FL | 2A4 |
Every issue · 2
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| April 29, 2025 | Reissued, current | Certificate |
| December 4, 2006 | Reissued, earlier issue | Certificate |