AD 57-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23 | Airworthiness Directives; Piper Model PA-23 Aircraft |
Unsafe Condition
Possibility of stabilizer failure or malfunction due to insufficient bolts securing the front stabilizer fittings to the longitudinal stringer and bulkhead.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the two front stabilizer attachment fittings to ensure three bolts secure each fitting (two in the stringer and one in the bulkhead). If less than three bolts are present, correct the condition by removing the stabilizer fairing and using a mirror for inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than February 15, 1957
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Aircraft Inc. Model PA-23, Serial Numbers 23-1 to 23-844 inclusive.
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Federal Register Abstract
Stabilizer Attachment Bolts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_57-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 57-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23 Aircraft Subject: Stabilizer Attachment Bolts Status: Current Citation: This information is not available. Citation Publish Date: 08/01/1957 Effective Date: Make: Piper Aircraft Inc. Model: PA-23 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: unable to find issue date AIRWORTHINESS DIRECTIVES FINAL RULES: 57-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 57-01-02 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 57-01-02 PIPER: Applies to Model PA-23, Serial Numbers 23-1 to 23-844 Inclusive. Compliance required not later than February 15, 1957. The following inspection and action is necessary in order to prevent the possibility of stabilizer failure or malfunction in the event the proper number of bolts are not found attaching the front stabilizer fittings, right and left, P/N 17093-00. Inspect the two front stabilizer attachment fittings and ascertain that there are three bolts securing each fitting to the longitudinal stringer and the bulkhead (two in the stringer and one in the bulkhead). If less than three bolts have been used, the unsatisfactory condition must be corrected. It will be necessary to remove the stabilizer fairing on the bottom side, and to use a mirror to make the inspection. (Piper Service Bulletin No. 150 of December 21, 1956, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_57-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 57-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23 Aircraft Subject: Stabilizer Attachment Bolts Status: Current Citation: This information is not available. Citation Publish Date: 08/01/1957 Effective Date: Make: Piper Aircraft Inc. Model: PA-23 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: unable to find issue date AIRWORTHINESS DIRECTIVES FINAL RULES: 57-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 57-01-02 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 57-01-02 PIPER: Applies to Model PA-23, Serial Numbers 23-1 to 23-844 Inclusive. Compliance required not later than February 15, 1957. The following inspection and action is necessary in order to prevent the possibility of stabilizer failure or malfunction in the event the proper number of bolts are not found attaching the front stabilizer fittings, right and left, P/N 17093-00. Inspect the two front stabilizer attachment fittings and ascertain that there are three bolts securing each fitting to the longitudinal stringer and the bulkhead (two in the stringer and one in the bulkhead). If less than three bolts have been used, the unsatisfactory condition must be corrected. It will be necessary to remove the stabilizer fairing on the bottom side, and to use a mirror to make the inspection. (Piper Service Bulletin No. 150 of December 21, 1956, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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