AD 65-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pacific Propeller, Inc. | A6441FN-606 | AERO PRODUCTS Model A6441FN-606 Propeller |
| propeller | Pacific Propeller, Inc. | A6441FN-606 | AERO PRODUCTS Model A6441FN-606 Propeller |
Unsafe Condition
Fatigue cracks in the cuff ring can cause blade failures.
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Required Actions
Inspect blades in accordance with Allison Commercial Service Letter No. 168 or an equivalent method approved by FAA. Remove the spinner assembly, fairing assemblies, blade deicing slip ring assembly, and attaching parts from the blade, clean the blade surface in the cuff ring area, and inspect for cracks using fluorescent or nonfluorescent magnetic particle process. Remove cracked blades from service and report immediately to FAA.
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Compliance Time
Compliance required as indicated, unless already accomplished. Inspections must be conducted within specified time frames based on time in service: blades with less than 750 hours' time in service on the effective date must be inspected within the next 450 hours' time in service; blades with 750 or more but less than 1,000 hours' must be inspected prior to 1,200 hours' time in service; blades with 1,000 or more but less than 1,600 hours' must be inspected within the next 200 hours' time in service; blades with 1,600 or more hours' must be inspected within the next 450 hours' time in service.
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Affected Aircraft
Pacific Propeller, Inc. Model A6441FN-606 Propeller Blades shipped from Allison before February 19, 1965, that have not been overhauled.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Cuff Ring
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_65-06-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 65-06-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AERO PRODUCTS Model A6441FN-606 Propeller Subject: Cuff Ring Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/13/1965 Make: Pacific Propeller, Inc. Model: A6441FN-606 Product Type: Propeller Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 65-06-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-47 AD NUMBER: 65-06-02 SUBJECT HEADING: AERO PRODUCTS Model A6441FN-606 Propeller ACTION: SUMMARY: DATES: Effective March 13, 1965. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 65-06-02 AERO PRODUCTS: Amdt. 39-47 Part 39 Federal Register March 13, 1965. Applies to A6441FN-606 Propeller Blades Shipped from Allison before February 19, 1965, That Have Not Been Overhauled. Compliance required as indicated, unless already accomplished. To prevent further blade failures as a result of fatigue cracks in the cuff ring, accomplish the following: (a) Inspect blades with less than 750 hours' time in service on the effective date of this AD in accordance with (e) within the next 450 hours' time in service. (b) Inspect blades with 750 or more but less than 1,000 hours' time in service on the effective date of this AD in accordance with (e) prior to the accumulation of 1,200 hours' time in service. (c) Inspect blades with 1,000 or more but less than 1,600 hours' time in service on the effective date of this AD in accordance with (e) within the next 200 hours' time in service. (d) Inspect blades with 1,600 or more hours' time in service on the effective date of this AD in accordance with (e) within the next 450 hours' time in service. (e) Remove the spinner assembly, fairing assemblies, blade deicing slip ring assembly and attaching parts from the blade, and clean the blade surface in the cuff ring area in accordance with Allison Commercial Service Letter No. 168 dated March 1, 1965. Inspect the cuff ring area for cracks by fluorescent or nonfluorescent magnetic particle process in accordance with Allison Commercial Service Letter No. 168, or by an equivalent method approved by the Engineering and Manufacturing Branch, FAA Central Region. (f) Remove cracked blades from service and report immediately by telephone or telegram to the Chief, Engineering and Manufacturing Branch, FAA Central Region, Kansas City, Missouri. NOTE: During the inspection required by this AD, particular attention should be given to the cuff ring fillets. This directive effective March 13, 1965. FOOTER:
Document Text
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AD Final Rules - DRS_65-06-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 65-06-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AERO PRODUCTS Model A6441FN-606 Propeller Subject: Cuff Ring Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/13/1965 Make: Pacific Propeller, Inc. Model: A6441FN-606 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: 65-06-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-47 AD NUMBER: 65-06-02 SUBJECT HEADING: AERO PRODUCTS Model A6441FN-606 Propeller ACTION: SUMMARY: DATES: Effective March 13, 1965. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 65-06-02 AERO PRODUCTS: Amdt. 39-47 Part 39 Federal Register March 13, 1965. Applies to A6441FN-606 Propeller Blades Shipped from Allison before February 19, 1965, That Have Not Been Overhauled. Compliance required as indicated, unless already accomplished. To prevent further blade failures as a result of fatigue cracks in the cuff ring, accomplish the following: (a) Inspect blades with less than 750 hours' time in service on the effective date of this AD in accordance with (e) within the next 450 hours' time in service. (b) Inspect blades with 750 or more but less than 1,000 hours' time in service on the effective date of this AD in accordance with (e) prior to the accumulation of 1,200 hours' time in service. (c) Inspect blades with 1,000 or more but less than 1,600 hours' time in service on the effective date of this AD in accordance with (e) within the next 200 hours' time in service. (d) Inspect blades with 1,600 or more hours' time in service on the effective date of this AD in accordance with (e) within the next 450 hours' time in service. (e) Remove the spinner assembly, fairing assemblies, blade deicing slip ring assembly and attaching parts from the blade, and clean the blade surface in the cuff ring area in accordance with Allison Commercial Service Letter No. 168 dated March 1, 1965. Inspect the cuff ring area for cracks by fluorescent or nonfluorescent magnetic particle process in accordance with Allison Commercial Service Letter No. 168, or by an equivalent method approved by the Engineering and Manufacturing Branch, FAA Central Region. (f) Remove cracked blades from service and report immediately by telephone or telegram to the Chief, Engineering and Manufacturing Branch, FAA Central Region, Kansas City, Missouri. NOTE: During the inspection required by this AD, particular attention should be given to the cuff ring fillets. This directive effective March 13, 1965. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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