AD 74-26-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
Unsafe Condition
Inadvertently or accidentally shutting down an engine due to lack of a protective guard over the magneto switches.
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Required Actions
Install a protective guard over the magneto switches in accordance with Piper Service Letter No. 675. Equivalent installations must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. Compliance time may be adjusted upon submission of substantiating data through an FAA Maintenance Inspector.
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Compliance Time
Within the next 100 hours time in service after the effective date of this Airworthiness Directive
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Affected Aircraft
Piper Models PA-31 (S/N 31-2 to 31-7300969), PA-31-300 (same serial range), PA-31-350 (S/N 31-5001 to 31-7305091), and PA-31P (S/N 31P-1 to 31P-7300161)
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Federal Register Abstract
Shutting Down Engine
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-26-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-26-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes Subject: Shutting Down Engine Status: Current Citation: This information is not available. Citation Publish Date: 12/18/1974 Effective Date: 12/26/1974 Make: Piper Aircraft Inc. Model: PA-31 | PA-31-300 | PA-31-350 | PA-31P Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 74-26-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2053 AD NUMBER: 74-26-10 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes ACTION: SUMMARY: DATES: Effective December 26, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-26-10 PIPER AIRCRAFT: Amendment 39-2053. Applies to Magneto Switch Guard Installation on Piper PA-31 and PA-31-300 S/N 31-2 to 31-7300969 incl; PA-31-350 S/N 31- 5001 to 31-7305091 incl; and PA-31P S/N 31P-1 to 31P-7300161 incl. To prevent inadvertently or accidentally shutting down an engine, perform the following: 1. Within the next 100 hours time in service, after the effective date of this Airworthiness Directive, install a protective guard over the magneto switches in accordance with Piper Service Letter No. 675, dated September 17, 1973. 2. Equivalent installations must be approved by the Chief, Engineering and Manufacturing Branch, Eastern Region, Jamaica, New York. 3. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the compliance time specified in this A.D. This amendment is effective December 26, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_74-26-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-26-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes Subject: Shutting Down Engine Status: Current Citation: This information is not available. Citation Publish Date: 12/18/1974 Effective Date: 12/26/1974 Make: Piper Aircraft Inc. Model: PA-31 | PA-31-300 | PA-31-350 | PA-31P 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: 74-26-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2053 AD NUMBER: 74-26-10 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes ACTION: SUMMARY: DATES: Effective December 26, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-26-10 PIPER AIRCRAFT: Amendment 39-2053. Applies to Magneto Switch Guard Installation on Piper PA-31 and PA-31-300 S/N 31-2 to 31-7300969 incl; PA-31-350 S/N 31- 5001 to 31-7305091 incl; and PA-31P S/N 31P-1 to 31P-7300161 incl. To prevent inadvertently or accidentally shutting down an engine, perform the following: 1. Within the next 100 hours time in service, after the effective date of this Airworthiness Directive, install a protective guard over the magneto switches in accordance with Piper Service Letter No. 675, dated September 17, 1973. 2. Equivalent installations must be approved by the Chief, Engineering and Manufacturing Branch, Eastern Region, Jamaica, New York. 3. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the compliance time specified in this A.D. This amendment is effective December 26, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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