AD 77-12-05
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Champion Spark Plug Company | Oil Filters | Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109 Oil Filters |
| appliance | Champion Spark Plug Company | Oil Filters | Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109 Oil Filters |
Unsafe Condition
Possible oil filter malfunction resulting from internal bypass valve failure
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Required Actions
Remove all applicable filters from service
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Compliance Time
before further flight
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Affected Aircraft
Champion Spark Plug Company Oil Filters, Part Numbers CH48108 (date codes 1A7E and 2A7C) and CH48109 (date codes 1A7G and 1A7I), except those stamped 'Insp OK 5G7A'
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Federal Register Abstract
Oil Filters
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-12-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-12-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109...Show more Subject: Oil Filters Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/12/1978 Make: Champion Spark Plug Company Model: Oil Filters Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-12-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3208 AD NUMBER: 77-12-05 SUBJECT HEADING: Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109 Oil Filters ACTION: SUMMARY: DATES: Effective May 12, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-12-05 CHAMPION SPARK PLUG COMPANY: Amendment 39-2923 as amended by Amendment 39-3208. Applies to Part Numbers CH48108 and CH48109 oil filters as installed in aircraft certified in all categories, identified by the following manufacturing date codes, 1A7E and 2A7C for the Part Number CH48108 filters, and 1A7G and 1A7I for the Part Number CH48109 oil filters, except for those affected filters which are identified with the symbol "Insp OK 5G7A" stamped adjacent to the manufacturing date code. The manufacturing date code is located on the outside of the filter housing adjacent to the filter installation instructions. Champion Spark Plug Company Aviation Sales Bulletin No. 77-13 also pertains to this subject. Compliance required before further flight, unless already accomplished, except that the airplane may be flown in accordance with FAR 21.197 to a base where the removal can be performed. To preclude possible oil filter malfunction resulting from internal bypass valve failure, remove all applicable filters from service. Amendment 39-2923 became effective June 24, 1977. This amendment 39-3208 becomes effective May 12, 1978. FOOTER:
Document Text
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AD Final Rules - DRS_77-12-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-12-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109...Show more Subject: Oil Filters Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/12/1978 Make: Champion Spark Plug Company Model: Oil Filters Product Type: Appliance 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: 77-12-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3208 AD NUMBER: 77-12-05 SUBJECT HEADING: Airworthiness Directives; CHAMPION SPARK PLUG COMPANY: Applies to Part Numbers CH48108 and CH48109 Oil Filters ACTION: SUMMARY: DATES: Effective May 12, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-12-05 CHAMPION SPARK PLUG COMPANY: Amendment 39-2923 as amended by Amendment 39-3208. Applies to Part Numbers CH48108 and CH48109 oil filters as installed in aircraft certified in all categories, identified by the following manufacturing date codes, 1A7E and 2A7C for the Part Number CH48108 filters, and 1A7G and 1A7I for the Part Number CH48109 oil filters, except for those affected filters which are identified with the symbol "Insp OK 5G7A" stamped adjacent to the manufacturing date code. The manufacturing date code is located on the outside of the filter housing adjacent to the filter installation instructions. Champion Spark Plug Company Aviation Sales Bulletin No. 77-13 also pertains to this subject. Compliance required before further flight, unless already accomplished, except that the airplane may be flown in accordance with FAR 21.197 to a base where the removal can be performed. To preclude possible oil filter malfunction resulting from internal bypass valve failure, remove all applicable filters from service. Amendment 39-2923 became effective June 24, 1977. This amendment 39-3208 becomes effective May 12, 1978. FOOTER:
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Retrieved: Apr 8, 2026
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