AD 57-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23 | Airworthiness Directives; Piper Model PA-23 Aircraft |
Unsafe Condition
The Heim rod end bearing (P/N HMX-4M) may have more than six threads exposed on the rod end where it attaches the front elevator control tube to the lower horn on the control column, which could lead to control column misrigging and potential elevator control malfunction.
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Required Actions
Inspect the Heim rod end bearing (P/N HMX-4M) to ensure six or fewer threads are exposed. Rerig the control column if more than six threads are visible, as per Piper Service Bulletin No. 156.
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Compliance Time
November 1, 1957
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Affected Aircraft
Piper Model PA-23 aircraft with serial numbers 23-129, 23-132 to 23-228 inclusive; 23-230 to 23-766 inclusive; 23-768 to 23-850 inclusive; 23-852 to 23-883 inclusive; 23-885 to 23-937 inclusive; 23-939 to 23-1017 inclusive; 23-1019, 23-1020, 23-1022 to 23-1030 inclusive; 23-1032 to 23-1042 inclusive; 23-1044, 23-1046 to 23-1057 inclusive; 23-1059 to 23-1064 inclusive; 23-1066, 23-1069 to 23-1074 inclusive; 23-1076, 23-1078 to 23-1082 inclusive.
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Federal Register Abstract
Elevator Rod End Bearing
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_57-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 57-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23 Aircraft Subject: Elevator Rod End Bearing Status: Current Citation: This information is not available. Citation Publish Date: 01/23/1958 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Date: Make: Piper Aircraft Inc. Model: PA-23 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 57-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 57-19-01 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 57-19-01 PIPER: Applies to Model PA-23, Serial Numbers 23-129, 23-132 to 23-228 Inclusive; 23-230 to 23-766 Inclusive; 23-768 to 23-850 Inclusive; 23-852 to 23-883 Inclusive; 23-885 to 23-937 Inclusive; 23-939 to 23-1017 Inclusive; 23-1019, 23-1020, 23-1022 to 23-1030 Inclusive; 23-1032 to 23-1042 Inclusive; 23-1044, 23-1046 to 23-1057 Inclusive; 23-1059 to 23- 1064 Inclusive; 23-1066, 23-1069 to 23-1074 Inclusive; 23-1076, 23-1078 to 23-1082 Inclusive. Compliance required by November 1, 1957. Inspect the Heim rod end bearing (P/N HMX-4M) located where the front elevator control tube attaches to the lower horn on the control column. If more than six threads show on the rod end, rerig the control column so that six or less threads are exposed. (Piper Service Bulletin No. 156 dated July 2, 1957, covers this subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_57-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 57-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23 Aircraft Subject: Elevator Rod End Bearing Status: Current Citation: This information is not available. Citation Publish Date: 01/23/1958 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: 57-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 57-19-01 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 57-19-01 PIPER: Applies to Model PA-23, Serial Numbers 23-129, 23-132 to 23-228 Inclusive; 23-230 to 23-766 Inclusive; 23-768 to 23-850 Inclusive; 23-852 to 23-883 Inclusive; 23-885 to 23-937 Inclusive; 23-939 to 23-1017 Inclusive; 23-1019, 23-1020, 23-1022 to 23-1030 Inclusive; 23-1032 to 23-1042 Inclusive; 23-1044, 23-1046 to 23-1057 Inclusive; 23-1059 to 23- 1064 Inclusive; 23-1066, 23-1069 to 23-1074 Inclusive; 23-1076, 23-1078 to 23-1082 Inclusive. Compliance required by November 1, 1957. Inspect the Heim rod end bearing (P/N HMX-4M) located where the front elevator control tube attaches to the lower horn on the control column. If more than six threads show on the rod end, rerig the control column so that six or less threads are exposed. (Piper Service Bulletin No. 156 dated July 2, 1957, covers this subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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