AD 78-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31T | Airworthiness Directives; Piper Aircraft Model PA-31T |
Unsafe Condition
Failure to reprogram the flap selector when the selector is inadvertently moved beyond the 'Approach' detent during flap position selection could result in unintended flap retraction to the original position.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Insert a CAUTION in the FAA-approved Airplane Flight Manual (Piper Report 1740) or Pilot's Operating Handbook (Piper Report 2048) specifying that the flap selector must be returned to its original position and then back to 'Approach' to reprogram the selector after inadvertent movement beyond the 'Approach' detent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective April 26, 1978
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Aircraft Model PA-31T certificated in all categories.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Flap System Operation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_78-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-08-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Aircraft Model PA-31T Subject: Flap System Operation Status: Current Citation: This information is not available. Citation Publish Date: 04/24/1978 Effective Date: 04/26/1978 Make: Piper Aircraft Inc. Model: PA-31T Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 78-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3194 AD NUMBER: 78-08-12 SUBJECT HEADING: Airworthiness Directives; Piper Aircraft Model PA-31T ACTION: SUMMARY: DATES: Effective April 26, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-08-12 PIPER AIRCRAFT CORPORATION: Amendment 39-3194. Applies to Piper Aircraft Corporation Model PA-31T certificated in all categories. To provide additional information on flap system operation, insert the following CAUTION or Piper PA-31T, Revision 12 of December 27, 1977, in the FAA Approved Airplane Flight Manual, Piper Report 1740 or Revision 4, dated December 9, 1977, to the Pilot's Operating Handbook, Piper Report 2048. CAUTION When selecting an "Approach" flap position and the selector is inadvertently moved beyond the "Approach" detent, the selector must be returned to its original position and then back to "Approach" in order to reprogram the selector. Returning the selector to the "Approach" detent without re-programming will return the flaps to their original position. This amendment is effective April 26, 1978. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_78-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-08-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Aircraft Model PA-31T Subject: Flap System Operation Status: Current Citation: This information is not available. Citation Publish Date: 04/24/1978 Effective Date: 04/26/1978 Make: Piper Aircraft Inc. Model: PA-31T 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: 78-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3194 AD NUMBER: 78-08-12 SUBJECT HEADING: Airworthiness Directives; Piper Aircraft Model PA-31T ACTION: SUMMARY: DATES: Effective April 26, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-08-12 PIPER AIRCRAFT CORPORATION: Amendment 39-3194. Applies to Piper Aircraft Corporation Model PA-31T certificated in all categories. To provide additional information on flap system operation, insert the following CAUTION or Piper PA-31T, Revision 12 of December 27, 1977, in the FAA Approved Airplane Flight Manual, Piper Report 1740 or Revision 4, dated December 9, 1977, to the Pilot's Operating Handbook, Piper Report 2048. CAUTION When selecting an "Approach" flap position and the selector is inadvertently moved beyond the "Approach" detent, the selector must be returned to its original position and then back to "Approach" in order to reprogram the selector. Returning the selector to the "Approach" detent without re-programming will return the flaps to their original position. This amendment is effective April 26, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.