AD 77-09-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-24-260 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-30 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-39 | Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft |
Unsafe Condition
The electric trim switch may fail, resulting in loss of trim control or unintended trim movement.
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Required Actions
Modify the electric trim switch in accordance with Piper Service Bulletin No. 527 dated November 5, 1976, or an equivalent method approved by the FAA. Compliance may be adjusted upon request with substantiating data through an FAA Maintenance Inspector.
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Compliance Time
within the next 100 hours in service after the effective date of this AD
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Affected Aircraft
Piper Models PA-23-250 (S/Nos. 27-3837, 27-3944 to 27-4796), PA-24-260 (S/Nos. 24-4783, 24-4804 to 24-5047), PA-30 (S/Nos. 30-1717, 30-1745 to 30-2000), PA-31 and 31-300 (S/Nos. 31-2 to 31-797), PA-31-350 (S/Nos. 31-5001 to 31-5004), PA-31P (S/Nos. 31P-1 to 31P-109), and PA-39 (S/Nos. 39-1 to 39-155).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Electric Trim Switch
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-09-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-09-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-...Show more Subject: Electric Trim Switch Status: Current Citation: This information is not available. Citation Publish Date: 05/09/1977 Effective Date: 05/12/1977 Make: Piper Aircraft Inc. Model: PA-23-250 | PA-23-250 (Navy UO-1) | PA-24-260 | PA-30 | PA-31 | PA-31-300 | PA-31-350 | PA-31P | PA-39 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: 77-09-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2892 AD NUMBER: 77-09-10 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft ACTION: SUMMARY: DATES: Effective May 12, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-09-10 PIPER AIRCRAFT CORP: Amendment 39-2892. Applies to models: PA-23-250 (6 place) S/Nos. 27-3837, 27-3944 to 27-4796 inclusive PA-24-260 S/Nos. 24-4783, 24-4804 to 24-5047 inclusive PA-30 S/Nos. 30-1717, 30-1745 to 30-2000 inclusive PA-31 and 31-300 S/Nos. 31-2 to 31-797 inclusive PA-31-350 S/Nos. 31-5001 to 31-5004 inclusive PA-31P S/Nos. 31P-1 to 31P-109 inclusive PA-39 S/Nos. 39-1 to 39-155 inclusive Compliance required within the next 100 hours in service after the effective date of this AD, unless already accomplished. (a) Modify the electric trim switch in accordance with instruction paragraph of Piper Service Bulletin No. 527, dated November 5, 1976, or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (b) Upon request with substantiating data submitted through an FAA Maintenance Inspector, the compliance time specified in this AD may be adjusted by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. This amendment becomes effective May 12, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-09-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-09-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-...Show more Subject: Electric Trim Switch Status: Current Citation: This information is not available. Citation Publish Date: 05/09/1977 Effective Date: 05/12/1977 Make: Piper Aircraft Inc. Model: PA-23-250 | PA-23-250 (Navy UO-1) | PA-24-260 | PA-30 | PA-31 | PA-31-300 | PA-31-350 | PA-31P | PA-39 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: 77-09-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2892 AD NUMBER: 77-09-10 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-23-250, PA-24-260, PA-30, PA-31, PA-31-300, PA-31-350, PA-31P, and PA-39 Aircraft ACTION: SUMMARY: DATES: Effective May 12, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-09-10 PIPER AIRCRAFT CORP: Amendment 39-2892. Applies to models: PA-23-250 (6 place) S/Nos. 27-3837, 27-3944 to 27-4796 inclusive PA-24-260 S/Nos. 24-4783, 24-4804 to 24-5047 inclusive PA-30 S/Nos. 30-1717, 30-1745 to 30-2000 inclusive PA-31 and 31-300 S/Nos. 31-2 to 31-797 inclusive PA-31-350 S/Nos. 31-5001 to 31-5004 inclusive PA-31P S/Nos. 31P-1 to 31P-109 inclusive PA-39 S/Nos. 39-1 to 39-155 inclusive Compliance required within the next 100 hours in service after the effective date of this AD, unless already accomplished. (a) Modify the electric trim switch in accordance with instruction paragraph of Piper Service Bulletin No. 527, dated November 5, 1976, or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (b) Upon request with substantiating data submitted through an FAA Maintenance Inspector, the compliance time specified in this AD may be adjusted by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. This amendment becomes effective May 12, 1977. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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