AD 47-10-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49-46 and 49-51 Airplanes |
Unsafe Condition
Failure to convert Model 49-51 airplanes to Model 49-46 configuration through installation of required service bulletins may result in unsafe operation due to non-compliance with performance values in the Operation Manual.
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Required Actions
Convert all Model 49-51 aircraft to Model 49-46 configuration by complying with specified service bulletins including 49/SB-1, 49/SB-14, 49/SB-24, 49/SB-124, Wright C18-23, 49/SB-230, and 49/SB-231. Recertification requires compliance with these bulletins. Check compliance with revised bulletins within next 200 hours of operation for previously certified aircraft.
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Compliance Time
prior to June 1, 1947
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Affected Aircraft
Lockheed Model 49-46 serials up to and including 2075 and all Model 49-51 airplanes.
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Federal Register Abstract
Conversion of 49-51 to 49-46
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-10-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49-46 and 49-51 Airplanes Subject: Conversion of 49-51 to 49-46 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Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-10-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-16 SUBJECT HEADING: LOCKHEED Model 49-46 and 49-51 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-16 LOCKHEED: (Was Mandatory Note 18 of AD-763-3.) Applies to All Model 49-46 Serials Up to and Including 2075 and to All Model 49-51 Airplanes. (This supersedes Supplement Number 1 to AD-763 (Special) Dated August 26, 1946.) Compliance required prior to June 1, 1947. All Model 49-51 aircraft shall be converted to Model 49-46 aircraft. Prior to recertification of Model 49-46 aircraft converted from Model 49-51 aircraft, the following Service Bulletins in addition to those listed in Note 47-10-15 must be complied with: **49/SB-1, revised June 7, 1946 - Installation of Two-Speed Supercharger Controls. *49/SB-14, revised July 27, 1946 - Installation of Bendix Direct Fuel Injection System. 49/SB-24, dated June 5, 1946 - Rework of Engine Cowl Diaphragm Structure. 49/SB-124, revised July 27, 1946 - Rewiring of Engine Fire Detector System. Wright Aeronautical Corp. Bulletin C18-23, dated October 4, 1946 - Fuel Injection Tube Installation. **49/SB-230, dated November 3, 1946 - Engine Oil Cooler Temperature Control Regulators - Recalibration of. **49/SB-231, dated November 2, 1946 - Engine Oil Pump Pressure and Engine Oil Pressure Gauge Range Markings - Adjustment of. *Service Bulletin 49/SB-14 has been revised subsequent to issuance of AD-763 (Special), Supplement No. 1, dated Aug. 26, 1946. Model 49-46 aircraft certificated in accordance with that AD Supplement should be checked for compliance with this later revision within next 200 hours of operation. **Service Bulletin 49/SB-1 was not listed in AD-763 (Special), Supplement No. 1, dated Aug. 26, 1946, but must be complied with to permit use of new performance values shown in the Operation Manual for Model 49-46 aircraft, Lockheed Report No. 5817. All Model 49-46 aircraft certificated in accordance with that Supplement to AD-763 (Special) should be checked for compliance with Bulletins 49/SB-1, 230 and 231 within next 200 hours of operation. FOOTER:
Document Text
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AD Final Rules - DRS_47-10-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49-46 and 49-51 Airplanes Subject: Conversion of 49-51 to 49-46 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: 47-10-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-16 SUBJECT HEADING: LOCKHEED Model 49-46 and 49-51 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-16 LOCKHEED: (Was Mandatory Note 18 of AD-763-3.) Applies to All Model 49-46 Serials Up to and Including 2075 and to All Model 49-51 Airplanes. (This supersedes Supplement Number 1 to AD-763 (Special) Dated August 26, 1946.) Compliance required prior to June 1, 1947. All Model 49-51 aircraft shall be converted to Model 49-46 aircraft. Prior to recertification of Model 49-46 aircraft converted from Model 49-51 aircraft, the following Service Bulletins in addition to those listed in Note 47-10-15 must be complied with: **49/SB-1, revised June 7, 1946 - Installation of Two-Speed Supercharger Controls. *49/SB-14, revised July 27, 1946 - Installation of Bendix Direct Fuel Injection System. 49/SB-24, dated June 5, 1946 - Rework of Engine Cowl Diaphragm Structure. 49/SB-124, revised July 27, 1946 - Rewiring of Engine Fire Detector System. Wright Aeronautical Corp. Bulletin C18-23, dated October 4, 1946 - Fuel Injection Tube Installation. **49/SB-230, dated November 3, 1946 - Engine Oil Cooler Temperature Control Regulators - Recalibration of. **49/SB-231, dated November 2, 1946 - Engine Oil Pump Pressure and Engine Oil Pressure Gauge Range Markings - Adjustment of. *Service Bulletin 49/SB-14 has been revised subsequent to issuance of AD-763 (Special), Supplement No. 1, dated Aug. 26, 1946. Model 49-46 aircraft certificated in accordance with that AD Supplement should be checked for compliance with this later revision within next 200 hours of operation. **Service Bulletin 49/SB-1 was not listed in AD-763 (Special), Supplement No. 1, dated Aug. 26, 1946, but must be complied with to permit use of new performance values shown in the Operation Manual for Model 49-46 aircraft, Lockheed Report No. 5817. All Model 49-46 aircraft certificated in accordance with that Supplement to AD-763 (Special) should be checked for compliance with Bulletins 49/SB-1, 230 and 231 within next 200 hours of operation. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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