AD 47-10-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Failure of the cabin supercharger drive shafts or cabin supercharger due to inadequate design or maintenance, leading to loss of cabin pressurization or supercharger failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace cabin supercharger drive shafts per SB 49/SB-107, replace cabin supercharger per SB 49/SB-141, and install supercharger oil temperature indicator per SB 49/SB-156. Check compliance with later revisions within 150 hours of operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to resumption of cabin supercharger operation
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Aircraft Corporation Model 49 serial numbers up to and including 2075
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Cabin Supercharger Rework
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-10-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-17 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Cabin Supercharger Rework 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Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-10-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-17 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-17 LOCKHEED: (Was Mandatory Note 19 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2075. Compliance required prior to resumption of cabin supercharger operation. Prior to resumption of cabin supercharger operation, the following Lockheed Service Bulletins must be complied with: 49/SB-107, revised November 22, 1946 - Replacement of Cabin Supercharger Drive Shafts. 49/SB-141, revised August 7, 1946 - Replacement of Cabin Supercharger. 49/SB-156, revised September 17, 1946 - Installation of Supercharger Oil Temperature Indicator. The revision dates given for these three Bulletins are later than those listed in the Supplement to AD-763 (Special) dated September 25, 1946. Aircraft on which the cabin supercharging equipment was rendered operative in accordance with that Supplement should be checked for compliance with these later revisions dates within the next 150 hours of operation. FOOTER:
Document Text
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AD Final Rules - DRS_47-10-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-10-17 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Cabin Supercharger Rework 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: 47-10-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-10-17 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-10-17 LOCKHEED: (Was Mandatory Note 19 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2075. Compliance required prior to resumption of cabin supercharger operation. Prior to resumption of cabin supercharger operation, the following Lockheed Service Bulletins must be complied with: 49/SB-107, revised November 22, 1946 - Replacement of Cabin Supercharger Drive Shafts. 49/SB-141, revised August 7, 1946 - Replacement of Cabin Supercharger. 49/SB-156, revised September 17, 1946 - Installation of Supercharger Oil Temperature Indicator. The revision dates given for these three Bulletins are later than those listed in the Supplement to AD-763 (Special) dated September 25, 1946. Aircraft on which the cabin supercharging equipment was rendered operative in accordance with that Supplement should be checked for compliance with these later revisions dates within the next 150 hours of operation. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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