AD 58-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard | Propeller Blades | HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades) |
| appliance | Hamilton Standard | Propeller Blades | HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades) |
Unsafe Condition
Two surface-treated aluminum alloy blades fractured during operation due to blade bending which may have a serious detrimental effect on the fatigue strength of a blade.
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Required Actions
Inspect and measure face alinement values prior to overhaul and after operations affecting face alinement, following Hamilton Standard Service Bulletin No. 546.
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Compliance Time
At first blade overhaul after January 1, 1959, and at every overhaul thereafter.
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Affected Aircraft
Hamilton Standard 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades).
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Federal Register Abstract
Blades
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_58-22-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-22-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airf...Show more Subject: Blades Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Model: Propeller Blades Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 58-22-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-22-01 SUBJECT HEADING: HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades) ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-22-01 HAMILTON STANDARD: Applies to All 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades). Compliance required at first blade overhaul after January 1, 1959, and at every overhaul thereafter. Two surface-treated aluminum alloy blades have fractured during operation. Blade bending may have, depending on the circumstances surrounding the incident, a serious detrimental effect on the fatigue strength of a blade. Therefore, it is considered necessary to establish a means to detect and evaluate instances of unrecognized blade bending by systematically comparing at overhaul measured face alinement values with previously established values. To establish such a means, follow the detailed instructions contained in Hamilton Standard Service Bulletin No. 546. This procedure requires that face alinement measurements be made prior to any overhaul, and then again following all operations that would affect face alinement. (Hamilton Standard Service Bulletins Nos. 546 and 546A cover this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_58-22-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-22-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airf...Show more Subject: Blades Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Model: Propeller Blades Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 58-22-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-22-01 SUBJECT HEADING: HAMILTON STANDARD 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades) ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-22-01 HAMILTON STANDARD: Applies to All 6800, 6900, and 7000 Series Externally Surface-Treated Aluminum Alloy Blades (Airfoil Shotpeened and/or Shank Rolled, Including Nickel-Plated Blades). Compliance required at first blade overhaul after January 1, 1959, and at every overhaul thereafter. Two surface-treated aluminum alloy blades have fractured during operation. Blade bending may have, depending on the circumstances surrounding the incident, a serious detrimental effect on the fatigue strength of a blade. Therefore, it is considered necessary to establish a means to detect and evaluate instances of unrecognized blade bending by systematically comparing at overhaul measured face alinement values with previously established values. To establish such a means, follow the detailed instructions contained in Hamilton Standard Service Bulletin No. 546. This procedure requires that face alinement measurements be made prior to any overhaul, and then again following all operations that would affect face alinement. (Hamilton Standard Service Bulletins Nos. 546 and 546A cover this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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