AD 80-14-08

final rule

Airworthiness Directives; Piper Model PA-31T Airplanes

AD Number
80-14-08
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Piper Aircraft Inc. PA-31T Airworthiness Directives; Piper Model PA-31T Airplanes

Unsafe Condition

Undesirable high altitude (above 20,000 feet) Longitudinal Dynamic Stability (Phugoid) Characteristics

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Incorporate the applicable Airplane Flight Manual/Pilot's Operating Handbook Revision as listed in Piper Instructions 31T-6 (dated February 5, 1979) or PFL-31T-790228 (dated August 17, 1979). Submit substantiating data through an FAA Maintenance Inspector for potential adjustment of inspection intervals.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within 25 hours in service after the effective date of this AD unless already accomplished

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Piper Model PA-31T, Serial Numbers 31T-7400002 thru 31T-7620057 and PA-31T-7720001 thru 31T-7920004 certificated in all categories

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Airplane Flight Manual Revision

Applicability Source Text

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AD Number:
80-14-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Piper Model PA-31T Airplanes
Subject:
Airplane Flight Manual Revision
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
07/03/1980
Effective Date:
07/07/1980
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Superseded AD: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Superseded By: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: 80-14-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3829

AD NUMBER:   80-14-08

SUBJECT HEADING:   Airworthiness Directives; Piper Model PA-31T Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 7, 1980.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
80-14-08 PIPER: Amendment 39-3829. Applies to Model PA-31T, Serial Numbers 31T-7400002 thru 31T-7620057 and PA-31T-7720001 thru 31T-7920004 certificated in all categories.

Compliance required within 25 hours in service after the effective date of this AD unless already accomplished.

In order to prevent undesirable high altitude (above 20,000 feet) Longitudinal Dynamic Stability (Phugoid) Characteristics, accomplish the following:

a. Incorporate the applicable Airplane Flight Manual/Pilot's Operating Handbook Revision as listed below into the FAA-Delegation Option Authority approved Airplane Flight Manual/Pilot's Operating Handbook in accordance with Piper Instruction, Code 31T-6 dated February 5, 1979, or Piper Instruction Code PFL-31T-790228 dated August 17, 1979.

Airplane Serial Number: 31T-7400002 thru 31T-7620057. AFM/POH Rev. and Part No.: Rev. 11-761 560 (AFM). REM Rev. No.: 790228. Date: 2/28/79.

Airplane Serial Number: 31T-7720001 thru 31T-7920004. AFM/POH Rev. and Part No.: Rev. 5-761 625 (POH). AEM Rev. No.: 781006. Date: 10/6/78.

b. 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 inspection intervals specified in this AD.

c. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a) (1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Piper Aircraft Corporation, 820 E. Bald Eagle Street, Lock Haven, Pennsylvania 17745. These documents may also be examined at the Eastern Region, Federal Aviation Administration, Federal Building, JFK International Airport, Jamaica, New York 11430, and at FAA headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Eastern Region.

This amendment becomes effective July 7, 1980.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_80-14-08.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
80-14-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Piper Model PA-31T Airplanes
Subject:
Airplane Flight Manual Revision
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
07/03/1980
Effective Date:
07/07/1980
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: 80-14-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3829

AD NUMBER:   80-14-08

SUBJECT HEADING:   Airworthiness Directives; Piper Model PA-31T Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 7, 1980.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
80-14-08 PIPER: Amendment 39-3829. Applies to Model PA-31T, Serial Numbers 31T-7400002 thru 31T-7620057 and PA-31T-7720001 thru 31T-7920004 certificated in all categories.

Compliance required within 25 hours in service after the effective date of this AD unless already accomplished.

In order to prevent undesirable high altitude (above 20,000 feet) Longitudinal Dynamic Stability (Phugoid) Characteristics, accomplish the following:

a. Incorporate the applicable Airplane Flight Manual/Pilot's Operating Handbook Revision as listed below into the FAA-Delegation Option Authority approved Airplane Flight Manual/Pilot's Operating Handbook in accordance with Piper Instruction, Code 31T-6 dated February 5, 1979, or Piper Instruction Code PFL-31T-790228 dated August 17, 1979.

Airplane Serial Number: 31T-7400002 thru 31T-7620057. AFM/POH Rev. and Part No.: Rev. 11-761 560 (AFM). REM Rev. No.: 790228. Date: 2/28/79.

Airplane Serial Number: 31T-7720001 thru 31T-7920004. AFM/POH Rev. and Part No.: Rev. 5-761 625 (POH). AEM Rev. No.: 781006. Date: 10/6/78.

b. 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 inspection intervals specified in this AD.

c. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a) (1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Piper Aircraft Corporation, 820 E. Bald Eagle Street, Lock Haven, Pennsylvania 17745. These documents may also be examined at the Eastern Region, Federal Aviation Administration, Federal Building, JFK International Airport, Jamaica, New York 11430, and at FAA headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Eastern Region.

This amendment becomes effective July 7, 1980.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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