AD 59-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Curtiss-Wright Corporation | C634S | CURTISS Models C634S-C400 and C634S-C500 Series Propellers |
| propeller | Curtiss-Wright Corporation | C634S | CURTISS Models C634S-C400 and C634S-C500 Series Propellers |
Unsafe Condition
Excessive wear of power unit motor and mating speed reducer splines in Curtiss C634S-C400 and C634S-C500 Series propellers has been observed at a time short of a full overhaul period.
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Required Actions
Inspect rotor assembly P/N 113330 and drive sleeve P/N 102664 splines, and rear motor shaft bearing fit at each 500-600 hours' flying time. Discontinue mixture of Molybdenum Disulfide in spline lubricant and use only Lubriplate 315. Inspect as directed in Curtiss-Wright Corporation Propeller Division letters dated December 5, 1958, and March 20, 1959, and replace worn parts.
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Compliance Time
Compliance required as indicated.
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Affected Aircraft
CURTISS Models C634S-C400 and C634S-C500 Series Propellers.
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Federal Register Abstract
Rotor Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS Models C634S-C400 and C634S-C500 Series Propellers Subject: Rotor Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Curtiss-Wright Corporation Model: C634S Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-01 SUBJECT HEADING: CURTISS Models C634S-C400 and C634S-C500 Series Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-01 CURTISS: Applies to Models C634S-C400 and C634S-C500 Series Propellers. Compliance required as indicated. Excessive wear of power unit motor and mating speed reducer splines in Curtiss C634S- C400 and C634S-C500 Series propellers has been observed at a time short of a full overhaul period. Accordingly: (1) Inspect rotor assembly P/N 113330 and drive sleeve P/N 102664 splines, and rear motor shaft bearing fit at each 500-600 hours' flying time. (2) Discontinue mixture of Molybdenum Disulfide in spline lubricant. Use only Lubriplate 315. Inspect as directed in Curtiss-Wright Corporation Propeller Division letters to all operators of Lockheed 749 and 1049 Series aircraft dated December 5, 1958, and March 20, 1959. Worn parts must be replaced. This supersedes AD 58-25-02. FOOTER:
Document Text
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AD Final Rules - DRS_59-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS Models C634S-C400 and C634S-C500 Series Propellers Subject: Rotor Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Curtiss-Wright Corporation Model: C634S 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: 59-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-01 SUBJECT HEADING: CURTISS Models C634S-C400 and C634S-C500 Series Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-01 CURTISS: Applies to Models C634S-C400 and C634S-C500 Series Propellers. Compliance required as indicated. Excessive wear of power unit motor and mating speed reducer splines in Curtiss C634S- C400 and C634S-C500 Series propellers has been observed at a time short of a full overhaul period. Accordingly: (1) Inspect rotor assembly P/N 113330 and drive sleeve P/N 102664 splines, and rear motor shaft bearing fit at each 500-600 hours' flying time. (2) Discontinue mixture of Molybdenum Disulfide in spline lubricant. Use only Lubriplate 315. Inspect as directed in Curtiss-Wright Corporation Propeller Division letters to all operators of Lockheed 749 and 1049 Series aircraft dated December 5, 1958, and March 20, 1959. Worn parts must be replaced. This supersedes AD 58-25-02. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
63-24-01
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59-18-03
final ruleCURTISS Models C634S-C400 and C634S-C500 Series Propellers
Unsafe Condition: Peculiar wear of power unit motor and mating speed reducer splines in Curtiss C634S-C400 and C634S-C500 Series propellers has been observed at a time short of a full overhaul period.