AD 58-08-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | 34E | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
| aircraft | Hamilton Standard Division | 43E | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
| aircraft | Hamilton Standard Division | 43H | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
| propeller | Hamilton Standard Division | 34E | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
| propeller | Hamilton Standard Division | 43E | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
| propeller | Hamilton Standard Division | 43H | HAMILTON STANDARD Models 34E, 43E, and 43H Propellers |
Unsafe Condition
Cases of propeller-engine overspeeds have resulted in instances of failure to feather, reversing when feathering was initiated, and in aircraft fires.
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Required Actions
Install the 'RPM-Sensitive Hydraulic Pitch Lock' as per Hamilton Standard Service Bulletins Nos. 387, 472, and 472A.
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Compliance Time
At first propeller overhaul after October 1, 1958, but not later than May 1, 1959.
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Affected Aircraft
Hamilton Standard Division Models 34E, 43E, and 43H Propellers installed on TC18DA and TC18EA Series Engines.
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Federal Register Abstract
Pitch Lock
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_58-08-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-08-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Models 34E, 43E, and 43H Propellers Subject: Pitch Lock Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 34E | 43E | 43H Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 58-08-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-08-05 SUBJECT HEADING: HAMILTON STANDARD Models 34E, 43E, and 43H Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-08-05 HAMILTON STANDARD: Applies to All 34E, 43E, and 43H Propellers Installed on TC18DA and TC18EA Series Engines. Compliance required at first propeller overhaul after October 1, 1958, but not later than May 1, 1959. Cases of propeller-engine overspeeds have resulted in instances of failure to feather, reversing when feathering was initiated, and in aircraft fires. In order to provide a means for limiting propeller overspeeding so that the possibility of catastrophic conditions developing will be greatly minimized, install the "RPM-Sensitive Hydraulic Pitch Lock". (Hamilton Standard Service Bulletins Nos. 387, 472, and 472A cover this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_58-08-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-08-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Models 34E, 43E, and 43H Propellers Subject: Pitch Lock Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 34E | 43E | 43H Product Type: Propeller 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: 58-08-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-08-05 SUBJECT HEADING: HAMILTON STANDARD Models 34E, 43E, and 43H Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-08-05 HAMILTON STANDARD: Applies to All 34E, 43E, and 43H Propellers Installed on TC18DA and TC18EA Series Engines. Compliance required at first propeller overhaul after October 1, 1958, but not later than May 1, 1959. Cases of propeller-engine overspeeds have resulted in instances of failure to feather, reversing when feathering was initiated, and in aircraft fires. In order to provide a means for limiting propeller overspeeding so that the possibility of catastrophic conditions developing will be greatly minimized, install the "RPM-Sensitive Hydraulic Pitch Lock". (Hamilton Standard Service Bulletins Nos. 387, 472, and 472A cover this same 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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