AD 77-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes |
Unsafe Condition
Elevator balance weights may have insecure attachment (rivnut pullup) or cause elevator unbalance exceeding 108 in-lbs tail heavy maximum.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect elevator balance weights for secure attachment or remove weights and check elevator unbalance, repair or rebalance elevator as necessary per Nayak Service Bulletin No. 1 or equivalent approved method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours in service or at the next annual inspection, whichever occurs first, after the effective date unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-31 and PA-31-300 airplanes with wing luggage lockers installed per STC SA986SW.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Elevator Balance Weights
Applicability Source Text
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AD Final Rules - DRS_77-12-02.html
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AD Number:
77-12-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes
Subject:
Elevator Balance Weights
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
06/09/1977
Effective Date:
06/10/1977
Make:
Piper Aircraft Inc.
Model:
PA-31 | PA-31-300
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Superseded AD: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Superseded By: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: 77-12-02
CITATION: This information is not available.
PAGE NUMBER:
DOCKET NUMBER: Unknown
AMENDMENT: 39-3161
AD NUMBER: 77-12-02
SUBJECT HEADING: Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes
ACTION:
SUMMARY:
DATES: Effective April 10, 1978.
ADDRESSES:
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
REGULATORY TEXT:
77-12-02 PIPER: Amendment 39-2915 as amended by Amendment 39-3161. Applies to Piper Models PA-31 and PA-31-300 airplanes which have wing luggage lockers installed per STC SA986SW certificated in all categories.
Compliance required as indicated.
Within the next 25 hours in service or at the next annual inspection, whichever occurs first, after the effective date unless already accomplished, inspect the elevator balance weights for security of attachment ("rivnut pullup") or remove these weights and check elevator unbalance (108 in-lbs. tail heavy maximum) and repair or rebalance elevator, as necessary, in accordance with Nayak Service Bulletin No. 1, dated May 16, 1977, or later approved revisions or in accordance with an equivalent method approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration, Fort Worth, Texas.
Amendment 39-2915 became effective June 17, 1977.
This amendment 39-3161 becomes effective April 10, 1978.
FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_77-12-02.html
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Print/Save as PDF
Document Versions
Feedback
Details
AD Number:
77-12-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes
Subject:
Elevator Balance Weights
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
06/09/1977
Effective Date:
06/10/1977
Make:
Piper Aircraft Inc.
Model:
PA-31 | PA-31-300
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: 77-12-02
CITATION: This information is not available.
PAGE NUMBER:
DOCKET NUMBER: Unknown
AMENDMENT: 39-3161
AD NUMBER: 77-12-02
SUBJECT HEADING: Airworthiness Directives; Piper Models PA-31 and PA-31-300 Airplanes
ACTION:
SUMMARY:
DATES: Effective April 10, 1978.
ADDRESSES:
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
REGULATORY TEXT:
77-12-02 PIPER: Amendment 39-2915 as amended by Amendment 39-3161. Applies to Piper Models PA-31 and PA-31-300 airplanes which have wing luggage lockers installed per STC SA986SW certificated in all categories.
Compliance required as indicated.
Within the next 25 hours in service or at the next annual inspection, whichever occurs first, after the effective date unless already accomplished, inspect the elevator balance weights for security of attachment ("rivnut pullup") or remove these weights and check elevator unbalance (108 in-lbs. tail heavy maximum) and repair or rebalance elevator, as necessary, in accordance with Nayak Service Bulletin No. 1, dated May 16, 1977, or later approved revisions or in accordance with an equivalent method approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration, Fort Worth, Texas.
Amendment 39-2915 became effective June 17, 1977.
This amendment 39-3161 becomes effective April 10, 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.
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