AD 77-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | M7 Aerospace LLC | SA26-AT | Airworthiness Directives; Swearingen Models SA26-T and SA26-AT |
| aircraft | M7 Aerospace LLC | SA26-T | Airworthiness Directives; Swearingen Models SA26-T and SA26-AT |
Unsafe Condition
Failures of spar brackets, part numbers 26-31060-1, 26-31060-3, 26-31063-1, and 26-31063-3.
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Required Actions
Inspect spar brackets per Swearingen SB A57-00-27 within next ten flight hours unless done in last 100 flight hours. If cracks found, incorporate repair before further flight. If no cracks, inspect every 100 flight hours until repair is done. Alternate repairs require FAA approval.
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Compliance Time
Within the next ten flight hours, unless already accomplished within the last 100 flight hours
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Affected Aircraft
Swearingen Models SA26-T and SA26-AT with spar brackets P/N 26-31060-1, 26-31060-3, 26-31063-1, and 26-31063-3.
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Federal Register Abstract
Spar Brackets
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-04-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-04-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Swearingen Models SA26-T and SA26-AT Subject: Spar Brackets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/01/1977 Make: M7 Aerospace LLC Model: SA26-AT | SA26-T Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-04-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2840 AD NUMBER: 77-04-08 SUBJECT HEADING: Airworthiness Directives; Swearingen Models SA26-T and SA26-AT ACTION: SUMMARY: DATES: Effective March 1, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-04-08 SWEARINGEN : Amendment 39-2840. Applies to Models SA26-T and SA26-AT. Compliance required as indicated. To prevent failures of spar brackets, P/N 26-31060-1, 26-31060-3, 26-31063-1, and 26-31063-3, accomplish the following inspections and modifications: (a) Within the next ten flight hours, unless already accomplished within the last 100 flight hours, inspect the spar brackets in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions. (b) If cracks were found, before further flight, incorporate repair in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions. (c) If no cracks are found at initial inspection, inspect the aircraft each 100 flight hours thereafter or until the repair is incorporated. (d) Alternate methods of spar bracket repair must be approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, FAA. This amendment becomes effective March 1, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-04-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-04-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Swearingen Models SA26-T and SA26-AT Subject: Spar Brackets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/01/1977 Make: M7 Aerospace LLC Model: SA26-AT | SA26-T Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-04-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2840 AD NUMBER: 77-04-08 SUBJECT HEADING: Airworthiness Directives; Swearingen Models SA26-T and SA26-AT ACTION: SUMMARY: DATES: Effective March 1, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-04-08 SWEARINGEN : Amendment 39-2840. Applies to Models SA26-T and SA26-AT. Compliance required as indicated. To prevent failures of spar brackets, P/N 26-31060-1, 26-31060-3, 26-31063-1, and 26-31063-3, accomplish the following inspections and modifications: (a) Within the next ten flight hours, unless already accomplished within the last 100 flight hours, inspect the spar brackets in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions. (b) If cracks were found, before further flight, incorporate repair in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions. (c) If no cracks are found at initial inspection, inspect the aircraft each 100 flight hours thereafter or until the repair is incorporated. (d) Alternate methods of spar bracket repair must be approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, FAA. This amendment becomes effective March 1, 1977. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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