AD 47-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Landing gear selector valve (Bendix P/N 403875-0-1) may fail due to inadequate poppet design, risking improper operation of the landing gear system.
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Required Actions
Inspect the landing gear selector valve in the forward cargo compartment. Replace unreworked valves with reworked valves bearing serial numbers 1 through 120 with an 'R' suffix.
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Compliance Time
prior to March 15, 1947
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 serial numbers 2021 to 2088, inclusive.
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Federal Register Abstract
Landing Gear Selector Valve
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-10-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Landing Gear Selector Valve 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Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-10-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-05 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-05 LOCKHEED: (Was Mandatory Note 6 of AD-763-3.) Applies Only to Model 49 Serial Numbers 2021 to 2088, Inclusive. Compliance required prior to March 15, 1947. Inspect landing gear selector valve (Bendix P/N 403875-0-1) installed in forward cargo compartment. Those valves bearing Serial Numbers 1 through 120 and identified by letter "R: following the serial number have been reworked to incorporate a new type poppet. All unreworked valves should be replaced with reworked valves. (LAC Service Instruction 049/SI-34 covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_47-10-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Landing Gear Selector Valve 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: 47-10-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-05 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-05 LOCKHEED: (Was Mandatory Note 6 of AD-763-3.) Applies Only to Model 49 Serial Numbers 2021 to 2088, Inclusive. Compliance required prior to March 15, 1947. Inspect landing gear selector valve (Bendix P/N 403875-0-1) installed in forward cargo compartment. Those valves bearing Serial Numbers 1 through 120 and identified by letter "R: following the serial number have been reworked to incorporate a new type poppet. All unreworked valves should be replaced with reworked valves. (LAC Service Instruction 049/SI-34 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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