AD 47-10-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
The use of switches and relays in the rudder and elevator auxiliary boost motor circuits may result in unintended circuit interruption, compromising flight control systems.
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Required Actions
Install non-trip-free circuit breakers in the rudder and elevator auxiliary boost motor circuits and revise the wiring as necessary.
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Compliance Time
prior to March 1, 1947
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Affected Aircraft
Lockheed Aircraft Corporation Model 49, serial numbers 2021 to 2079, inclusive.
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Federal Register Abstract
Rudder and Elevator Circuit Breakers
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-10-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Rudder and Elevator Circuit Breakers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-10-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-03 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-03 LOCKHEED: (Was Mandatory Note 2 of AD-763-3.) Applies Only to Model 49 Serial Numbers 2021 to 2079, Inclusive. Compliance required prior to March 1, 1947. (Note: AD 47-10-02 must be complied with prior to or in conjunction with this Note.) Install non-trip-free circuit breakers in the rudder and elevator auxiliary boost motor circuits, in place of switches and relays, and revise the wiring of the circuits as necessary. (LAC Service Bulletin 049/SB-22 covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_47-10-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Rudder and Elevator Circuit Breakers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large 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: 47-10-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-03 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-03 LOCKHEED: (Was Mandatory Note 2 of AD-763-3.) Applies Only to Model 49 Serial Numbers 2021 to 2079, Inclusive. Compliance required prior to March 1, 1947. (Note: AD 47-10-02 must be complied with prior to or in conjunction with this Note.) Install non-trip-free circuit breakers in the rudder and elevator auxiliary boost motor circuits, in place of switches and relays, and revise the wiring of the circuits as necessary. (LAC Service Bulletin 049/SB-22 covers this same subject.) 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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