AD 47-30-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | Army AT-11 | Airworthiness Directives; Beech Model AT-11 Aircraft |
Unsafe Condition
Failure of the generator circuit protective devices could result in uncontrolled electrical overloads and potential fire hazards.
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Required Actions
Install a 50-ampere trip-free circuit breaker (Spencer Thermostat Co. PLM-50 or equivalent) between the battery terminal of each generator cutout and its respective ammeter shunt. Ensure the circuit breakers are accessible in flight and labeled appropriately.
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Compliance Time
prior to certification or, if certificated, on next periodic inspection but not later than October 1, 1947
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Affected Aircraft
Beech Model AT-11 aircraft not equipped with generator circuit protective devices.
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Federal Register Abstract
Trip-Free Circuit Breaker
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-30-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-30-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Model AT-11 Aircraft Subject: Trip-Free Circuit Breaker Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-30-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-30-07 SUBJECT HEADING: Airworthiness Directives; Beech Model AT-11 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-30-07 BEECH: (Was Mandatory Note 3 of AD-2-582-2.) Applies Only to AT-11 Aircraft Which Are Not Equipped With Generator Circuit Protective Devices. To be accomplished prior to certification or, if certificated, on next periodic inspection but not later than October 1, 1947. In accordance with Figure 1 install a 50-ampere trip-free circuit breaker, Spencer Thermostat Co. PLM-50 or equivalent, between the battery terminal of each generator cutout and its respective ammeter shunt. The circuit breakers should be accessible in flight and labeled respectively: "LEFT GEN. CIRCUIT" and "RIGHT GEN. CIRCUIT." FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-30-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-30-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Model AT-11 Aircraft Subject: Trip-Free Circuit Breaker Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 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: 47-30-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-30-07 SUBJECT HEADING: Airworthiness Directives; Beech Model AT-11 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-30-07 BEECH: (Was Mandatory Note 3 of AD-2-582-2.) Applies Only to AT-11 Aircraft Which Are Not Equipped With Generator Circuit Protective Devices. To be accomplished prior to certification or, if certificated, on next periodic inspection but not later than October 1, 1947. In accordance with Figure 1 install a 50-ampere trip-free circuit breaker, Spencer Thermostat Co. PLM-50 or equivalent, between the battery terminal of each generator cutout and its respective ammeter shunt. The circuit breakers should be accessible in flight and labeled respectively: "LEFT GEN. CIRCUIT" and "RIGHT GEN. CIRCUIT." FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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