AD 80-19-02
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12D | Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters |
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12E | Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters |
Unsafe Condition
Engine, transmission, or driveline failure and resultant loss of power due to the Soloy Part Number 560-2408-2 engine output coupling shaft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace Soloy Part Number 560-2408-2 engine output coupling shaft with Soloy Part Number 660-2408-3 shaft in accordance with Soloy Service Bulletin Number 12-560 dated May 21, 1980, or later FAA approved revisions. Equivalent methods of compliance may be used when approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 500-hours operating time or 180 days, whichever occurs first, after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hiller Aviation Models UH-12D and UH-12E (including 4-place) helicopters converted to turbine power under Soloy Conversions, Ltd. Supplemental Type Certificates SH177WE or SH178WE
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Turbine Power - Soloy Conversions
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_80-19-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-19-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters Subject: Turbine Power - Soloy Conversions Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/11/1980 Make: Hiller Aviation | Siam Hiller Holdings, Inc. Model: UH-12D | UH-12E Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-19-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3910 AD NUMBER: 80-19-02 SUBJECT HEADING: Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters ACTION: SUMMARY: DATES: Effective October 11, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-19-02 HILLER AVIATION: Amendment 39-3910. Applies to Hiller UH-12D and UH-12E (including 4-place) helicopters certificated in all categories which have been converted to turbine power under Soloy Conversions, Ltd. Supplemental Type Certificates SH177WE or SH178WE. Compliance required within 500-hours operating time or 180 days, whichever occurs first, after the effective date of this AD. To prevent engine, transmission, or driveline failure and the resultant loss of power, replace Soloy Part Number 560-2408-2 engine output coupling shaft with Soloy Part Number 660-2408-3 shaft in accordance with Soloy Service Bulletin Number 12-560 dated May, 21, 1980, or later FAA approved revisions. Equivalent methods of compliance may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Soloy Conversions, Ltd., Post Office Box 60, Chehalis, Washington 98532. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective October 11, 1980. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_80-19-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-19-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters Subject: Turbine Power - Soloy Conversions Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/11/1980 Make: Hiller Aviation | Siam Hiller Holdings, Inc. Model: UH-12D | UH-12E Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-19-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3910 AD NUMBER: 80-19-02 SUBJECT HEADING: Airworthiness Directives; HILLER AVIATION Models UH-12D and UH-12E (including 4-place) Helicopters ACTION: SUMMARY: DATES: Effective October 11, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-19-02 HILLER AVIATION: Amendment 39-3910. Applies to Hiller UH-12D and UH-12E (including 4-place) helicopters certificated in all categories which have been converted to turbine power under Soloy Conversions, Ltd. Supplemental Type Certificates SH177WE or SH178WE. Compliance required within 500-hours operating time or 180 days, whichever occurs first, after the effective date of this AD. To prevent engine, transmission, or driveline failure and the resultant loss of power, replace Soloy Part Number 560-2408-2 engine output coupling shaft with Soloy Part Number 660-2408-3 shaft in accordance with Soloy Service Bulletin Number 12-560 dated May, 21, 1980, or later FAA approved revisions. Equivalent methods of compliance may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Soloy Conversions, Ltd., Post Office Box 60, Chehalis, Washington 98532. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective October 11, 1980. 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.