AD 67-25-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Model PA-31 Aircraft |
Unsafe Condition
Oil cooler hoses P/N 41230-09 and P/N 41230-12 may have broken strands of metal braid, stiffness, or discoloration, which could lead to hose failure.
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Required Actions
Inspect oil cooler hoses, remove steel bands, cut fire sleeves, check for defects, replace defective hoses, reinstall fire sleeves with stainless steel safety wire, clean hoses, and ensure proper routing and clamping clearance from exhaust systems. Follow Piper Service Bulletin No. 254 and install replacement kit P/N 757-167.
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Compliance Time
Prior to next flight and every five hours time in service thereafter, until Piper replacement kit P/N 757-167 is installed
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Affected Aircraft
Piper Model PA-31 Aircraft Serial Numbers 31-2 to 31-29 inclusive; 31-31 to 31-38 inclusive; 31-40 to 31-45 inclusive; 31-48, 31-54.
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Federal Register Abstract
Oil Cooler Hoses
Applicability Source Text
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AD Final Rules - DRS_67-25-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-25-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-31 Aircraft Subject: Oil Cooler Hoses Status: Current Citation: This information is not available. Citation Publish Date: 10/25/1967 Effective Date: 10/27/1967 Make: Piper Aircraft Inc. Model: PA-31 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-25-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-469 AD NUMBER: 67-25-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-31 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-25-06 PIPER: Amdt. No. 39-469, Part 39, Federal Register September 1, 1967. Applies to Piper Type PA-31 Aircraft Serial Numbers 31-2 to 31-29 inclusive; 31-31 to 31-38 inclusive; 31-40 to 31-45 inclusive; 31-48, 31-54. Compliance required as indicated unless already accomplished. Prior to next flight and every five hours time in service thereafter, until Piper replacement kit P/N 757-167 is installed; inspect oil cooler hoses P/N 41230-09 and P/N 41230-12 on each engine as follows: (a) Remove the hoses. (b) Cut steel bands which hold fire sleeve on hoses. (c) Remove fire sleeve and inspect hoses for broken strands of metal braid, stiffness, or discoloration. If broken strands of metal braid, stiffness, or discoloration are noted replace with new part. If none of the aforementioned defects are noted reinstall fire sleeve on hose using stainless steel safety wire in place of bands and thoroughly clean interior of hoses before reinstalling. (d) Hoses must be routed and clamped to provide maximum clearance from all exhaust system parts. Piper Service Bulletin No. 254 dated August 17, 1967. Piper Aircraft telegram dated August 4, 1967 and Federal Aviation Administration telegram of August 7, 1967 referencing oil cooler hoses on PA-31 aircraft covers this same subject. This amendment effective September 1, 1967. Revised October 27, 1967. FOOTER:
Document Text
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AD Final Rules - DRS_67-25-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-25-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-31 Aircraft Subject: Oil Cooler Hoses Status: Current Citation: This information is not available. Citation Publish Date: 10/25/1967 Effective Date: 10/27/1967 Make: Piper Aircraft Inc. Model: PA-31 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-25-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-469 AD NUMBER: 67-25-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-31 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-25-06 PIPER: Amdt. No. 39-469, Part 39, Federal Register September 1, 1967. Applies to Piper Type PA-31 Aircraft Serial Numbers 31-2 to 31-29 inclusive; 31-31 to 31-38 inclusive; 31-40 to 31-45 inclusive; 31-48, 31-54. Compliance required as indicated unless already accomplished. Prior to next flight and every five hours time in service thereafter, until Piper replacement kit P/N 757-167 is installed; inspect oil cooler hoses P/N 41230-09 and P/N 41230-12 on each engine as follows: (a) Remove the hoses. (b) Cut steel bands which hold fire sleeve on hoses. (c) Remove fire sleeve and inspect hoses for broken strands of metal braid, stiffness, or discoloration. If broken strands of metal braid, stiffness, or discoloration are noted replace with new part. If none of the aforementioned defects are noted reinstall fire sleeve on hose using stainless steel safety wire in place of bands and thoroughly clean interior of hoses before reinstalling. (d) Hoses must be routed and clamped to provide maximum clearance from all exhaust system parts. Piper Service Bulletin No. 254 dated August 17, 1967. Piper Aircraft telegram dated August 4, 1967 and Federal Aviation Administration telegram of August 7, 1967 referencing oil cooler hoses on PA-31 aircraft covers this same subject. This amendment effective September 1, 1967. Revised October 27, 1967. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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