AD 74-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aerostar Aircraft Corporation | PA-60-600 (Aerostar 600) | Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-601 (Aerostar 601) | Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes |
| aircraft | Aerostar Aircraft Corporation | PA-60-601P (Aerostar 601P) | Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes |
Unsafe Condition
Overloading of the remaining alternator system after failure of either dual alternator system could occur, potentially leading to electrical system failure.
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Required Actions
Amend the Airplane Flight Manual's Electrical System Load Limitations Section to limit continuous electrical load to 55 amps during IFR conditions, install a cockpit placard with the same limitation, and maintain this AD with the AFM until replaced by an approved revision. An approved alternate electrical warning system allows removal of these limitations.
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Compliance Time
within the next 30 days after the effective date of this AD, unless already accomplished
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Affected Aircraft
Aerostar Aircraft Corporation Models PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), and PA-60-601P (Aerostar 601P) with electrical attitude and directional gyros and 70 amp alternators installed by the manufacturer or via STC SA2336WE/SA2367WE
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Electrical Attitude And Directional Gyros
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-25-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes Subject: Electrical Attitude And Directional Gyros Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/04/1974 Make: Aerostar Aircraft Corporation Model: PA-60-600 (Aerostar 600) | PA-60-601 (Aerostar 601) | PA-60-601P (Aerostar 601P) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2029 AD NUMBER: 74-25-02 SUBJECT HEADING: Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes ACTION: SUMMARY: DATES: Effective December 4, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-25-02 TED R. SMITH & ASSOCIATES, INC.: Amendment 39-2029. Applies to Aerostar Models 600/601/601P airplanes certificated in all categories with electrical attitude and directional gyros and 70 amp alternators installed either by the manufacturer or by incorporating STC SA2336WE or STC SA2367WE, as provided below. Compliance required within the next 30 days after the effective date of this AD, unless already accomplished. To prevent the possible overloading of the remaining alternator system after failure of either one of the dual alternator systems, accomplish the following: (1) Amend, in pertinent part, the Electrical System Load Limitations Section of the FAA-approved Airplane Flight Manual for those airplanes affected, as follows: "Electrical System Load Limitations Aircraft with electrical attitude and directional gyros installed and equipped with 70 amp alternators: Do not exceed 55 amps continuous electrical load during IFR conditions. NOTE. To determine actual alternator load, total the left and right amp readings. Do not read main position for actual alternator load." (2) Install a placard in the cockpit, and add to the placard list in the AFM Limitations Section which provides: "Do not exceed 55 amps continuous electrical load during IFR conditions." (3) This airworthiness directive must remain with the Airplane Flight Manual until replaced by an FAA-approved AFM revision issued by Ted R. Smith & Associates, Inc. providing the limitations of this A.D. (4) The limitations described in (1), above, and placard installed per (2), above, may be removed upon the installation of an alternate electrical warning system approved by the Chief, Aircraft Engineering Division, FAA Western Region. This amendment becomes effective December 4, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_74-25-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes Subject: Electrical Attitude And Directional Gyros Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/04/1974 Make: Aerostar Aircraft Corporation Model: PA-60-600 (Aerostar 600) | PA-60-601 (Aerostar 601) | PA-60-601P (Aerostar 601P) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2029 AD NUMBER: 74-25-02 SUBJECT HEADING: Airworthiness Directives; Ted R Smith & Associates Models 600, 601, and 601P Airplanes ACTION: SUMMARY: DATES: Effective December 4, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-25-02 TED R. SMITH & ASSOCIATES, INC.: Amendment 39-2029. Applies to Aerostar Models 600/601/601P airplanes certificated in all categories with electrical attitude and directional gyros and 70 amp alternators installed either by the manufacturer or by incorporating STC SA2336WE or STC SA2367WE, as provided below. Compliance required within the next 30 days after the effective date of this AD, unless already accomplished. To prevent the possible overloading of the remaining alternator system after failure of either one of the dual alternator systems, accomplish the following: (1) Amend, in pertinent part, the Electrical System Load Limitations Section of the FAA-approved Airplane Flight Manual for those airplanes affected, as follows: "Electrical System Load Limitations Aircraft with electrical attitude and directional gyros installed and equipped with 70 amp alternators: Do not exceed 55 amps continuous electrical load during IFR conditions. NOTE. To determine actual alternator load, total the left and right amp readings. Do not read main position for actual alternator load." (2) Install a placard in the cockpit, and add to the placard list in the AFM Limitations Section which provides: "Do not exceed 55 amps continuous electrical load during IFR conditions." (3) This airworthiness directive must remain with the Airplane Flight Manual until replaced by an FAA-approved AFM revision issued by Ted R. Smith & Associates, Inc. providing the limitations of this A.D. (4) The limitations described in (1), above, and placard installed per (2), above, may be removed upon the installation of an alternate electrical warning system approved by the Chief, Aircraft Engineering Division, FAA Western Region. This amendment becomes effective December 4, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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