AD 58-18-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91) | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA2 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA3 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA4 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 981TC18EA1 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA1 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA2 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA3 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA4 | HAMILTON STANDARD Governors |
| aircraft | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA5 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91) | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA2 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA3 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 972TC18DA4 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 981TC18EA1 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA1 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA2 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA3 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA4 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA5 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Double Row Turbo Cyclone 988TC18EA6 | HAMILTON STANDARD Governors |
| appliance | Curtiss-Wright/Marquette, Inc. | Hamilton Standard | Governors | HAMILTON STANDARD Governors |
Unsafe Condition
Adverse environmental conditions in the propeller governor resulting from certain types of engine failure have caused improper operation of the governor in such a manner as to result in propeller overspeeding, failure to feather and reversing when feathering was initiated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install Deterjet Model DJ-1025 governor bypass valve or replace the 5U18 governor with the Hamilton Standard 5AA22 governor. Installation of Deterjet Model DJ-1025 on Douglas DC-7C approved under Supplemental Type Certificate SA4-507.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at first governor overhaul after December 1, 1958, but not later than June 1, 1959
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hamilton Standard Propellers Controlled by 5U18 Governors and Installed on TC18DA and TC18EA Series Engines
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Governor
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_58-18-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-18-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Governors Subject: Governor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Curtiss-Wright/Marquette, Inc. | Hamilton Standard Model: Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91) | Double Row Turbo Cyclone 972TC18DA2 | Double ...Show more 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: 58-18-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-18-01 SUBJECT HEADING: HAMILTON STANDARD Governors ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-18-01 HAMILTON STANDARD: Applies to All Hamilton Standard Propellers Controlled by 5U18 Governors and Installed on TC18DA and TC18EA Series Engines. Compliance required at first governor overhaul after December 1, 1958, but not later than June 1, 1959. Adverse environmental conditions in the propeller governor resulting from certain types of engine failure have caused improper operation of the governor in such a manner as to result in propeller overspeeding, failure to feather and reversing when feathering was initiated. In order to minimize the possibility of such occurrences, provide a means for feathering that will be independent of the low pressure relief and pilot valves incorporated in the 5U18 governors. Installation of the Deterjet Model DJ-1025 governor bypass valve or replacement of the 5U18 governor by the Hamilton Standard 5AA22 governor are considered acceptable means to accomplish the desired objective. (installation of Deterjet Model DJ-1025 on Douglas DC-7C approved under Supplemental Type Certificate SA4-507.) (Deterjet Service Bulletin No.1 and Hamilton Standard Bulletin No. 561 cover this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_58-18-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-18-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Governors Subject: Governor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Curtiss-Wright/Marquette, Inc. | Hamilton Standard Model: Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91) | Double Row Turbo Cyclone 972TC18DA2 | Double ...Show more 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: 58-18-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-18-01 SUBJECT HEADING: HAMILTON STANDARD Governors ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-18-01 HAMILTON STANDARD: Applies to All Hamilton Standard Propellers Controlled by 5U18 Governors and Installed on TC18DA and TC18EA Series Engines. Compliance required at first governor overhaul after December 1, 1958, but not later than June 1, 1959. Adverse environmental conditions in the propeller governor resulting from certain types of engine failure have caused improper operation of the governor in such a manner as to result in propeller overspeeding, failure to feather and reversing when feathering was initiated. In order to minimize the possibility of such occurrences, provide a means for feathering that will be independent of the low pressure relief and pilot valves incorporated in the 5U18 governors. Installation of the Deterjet Model DJ-1025 governor bypass valve or replacement of the 5U18 governor by the Hamilton Standard 5AA22 governor are considered acceptable means to accomplish the desired objective. (installation of Deterjet Model DJ-1025 on Douglas DC-7C approved under Supplemental Type Certificate SA4-507.) (Deterjet Service Bulletin No.1 and Hamilton Standard Bulletin No. 561 cover this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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