AD 59-17-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Helio Aircraft LLC | H-391B | Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 |
| aircraft | Helio Aircraft LLC | H-395 (USAF L-28A or U-10B) | Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 |
Unsafe Condition
Failure of the stabilator control system pulleys due to lack of adequate guards could result in cable wear and possible failure.
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Required Actions
Install additional pulley guards at three 3-inch stabilator control system pulleys located at specified positions: upper left-hand corner of the fuselage truss aft of the firewall, forward of the lower left-hand side of the instrument panel, and under the forward attach point of the vertical stabilizer in the aft portion of the tail cone.
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Compliance Time
within next 100 hours or by November 1, 1959, whichever occurs first
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Affected Aircraft
Helio Model H-391B Aircraft and Model H-395, Serial Number 075 and 502 Through 509 Inclusive
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Federal Register Abstract
Pulley Guards
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-17-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-17-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 Subject: Pulley Guards Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Helio Aircraft LLC Model: H-391B | H-395 (USAF L-28A or U-10B) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-17-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-17-06 SUBJECT HEADING: Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-17-06 HELIO: Applies to All Model H-391B Aircraft and Model H-395, Serial Number 075 and 502 Through 509 Inclusive. Compliance required within next 100 hours or by November 1, 1959, whichever occurs first. Install additional pulley guards at three 3-inch stabilator control system pulleys located at: (a) The upper left-hand corner of the fuselage truss just aft of the firewall. (b) Just forward of the lower left-hand side of the instrument panel. (c) Directly under the forward attach point of the vertical stabilizer in the aft portion of the tail cone. (The cable makes a 180 degree turn around this pulley.) (Helio Service Bulletin No. 20 covers this subject.) FOOTER:
Document Text
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AD Final Rules - DRS_59-17-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-17-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 Subject: Pulley Guards Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Helio Aircraft LLC Model: H-391B | H-395 (USAF L-28A or U-10B) Product Type: Aircraft Product Subtype: Small 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: 59-17-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-17-06 SUBJECT HEADING: Airworthiness Directives; Helio Model H-391B Aircraft and Model H-395 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-17-06 HELIO: Applies to All Model H-391B Aircraft and Model H-395, Serial Number 075 and 502 Through 509 Inclusive. Compliance required within next 100 hours or by November 1, 1959, whichever occurs first. Install additional pulley guards at three 3-inch stabilator control system pulleys located at: (a) The upper left-hand corner of the fuselage truss just aft of the firewall. (b) Just forward of the lower left-hand side of the instrument panel. (c) Directly under the forward attach point of the vertical stabilizer in the aft portion of the tail cone. (The cable makes a 180 degree turn around this pulley.) (Helio Service Bulletin No. 20 covers this subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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