AD 55-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | 242 | HAMILTON STANDARD Model 24260 Propellers |
| propeller | Hamilton Standard Division | 242 | HAMILTON STANDARD Model 24260 Propellers |
Unsafe Condition
Cracks occurring in several 24260 hubs when installed on Boeing 377 aircraft.
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Required Actions
Inspect hubs at every overhaul. Rework hubs at the earliest opportunity, but not later than the next overhaul following June 15, 1955, for hubs with 6,000 or more hours of total operating time.
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Compliance Time
not later than at the next overhaul following June 15, 1955
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Affected Aircraft
Hamilton Standard Division Model 24260 Propellers used on Boeing 377 Aircraft
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Federal Register Abstract
Hub
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_55-09-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-09-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Model 24260 Propellers Subject: Hub Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 242 Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 55-09-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-09-04 SUBJECT HEADING: HAMILTON STANDARD Model 24260 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-09-04 HAMILTON STANDARD: Applies to All 24260 Propeller Hub Barrels Used on Boeing 377 Aircraft. Compliance required as indicated. As a result of cracks occurring in several 24260 hubs when installed as noted, it is considered desirable to improve the strength characteristics of the hub by reworking and shotpeening the areas subject to such failures. Therefore, in order to minimize the possibility of failures of the nature indicated, accomplish the following: Inspection. Inspect at every overhaul Rework. Rework hubs at the earliest opportunity, but not later than at the next overhaul following June 15, 1955, for hubs with 6,000 or more hours of total operating time. (Hamilton Standard Service Bulletin No. 327 dated November 18, 1954, outlines the required rework.) FOOTER:
Document Text
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AD Final Rules - DRS_55-09-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-09-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Model 24260 Propellers Subject: Hub Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 242 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: 55-09-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-09-04 SUBJECT HEADING: HAMILTON STANDARD Model 24260 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-09-04 HAMILTON STANDARD: Applies to All 24260 Propeller Hub Barrels Used on Boeing 377 Aircraft. Compliance required as indicated. As a result of cracks occurring in several 24260 hubs when installed as noted, it is considered desirable to improve the strength characteristics of the hub by reworking and shotpeening the areas subject to such failures. Therefore, in order to minimize the possibility of failures of the nature indicated, accomplish the following: Inspection. Inspect at every overhaul Rework. Rework hubs at the earliest opportunity, but not later than at the next overhaul following June 15, 1955, for hubs with 6,000 or more hours of total operating time. (Hamilton Standard Service Bulletin No. 327 dated November 18, 1954, outlines the required rework.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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