AD 48-12-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 149-46 | LOCKHEED Models 49 and 149 Aircraft |
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Models 49 and 149 Aircraft |
Unsafe Condition
Fire Prevention Requirements
Required Actions
All air carrier aircraft must be modified to comply with fire prevention requirements outlined in CAR Amendments 41-3, 42-2, and 61-2. Modifications include installing louver covers, replacing upholstery, reworking receptacles, baggage compartment lining, smoke detectors, CO2 provisions, sealing access doors, relocating fire detectors, and installing check valves and metal landing gear doors as per specified service bulletins.
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Compliance Time
not later than the dates specified in the above amendments as revised by special Civil Air Regulations Serial Nos. 385, 390, 390A, 390B and any subsequent regulations affecting these compliance dates
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Affected Aircraft
Lockheed Aircraft Corporation Models 49 and 149 as specified by Civil Air Regulations Amendments 41-3, 42-2, and 61-2.
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Federal Register Abstract
Fire Prevention Requirements
Applicability Source Text
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AD Final Rules - DRS_48-12-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-12-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Models 49 and 149 Aircraft Subject: Fire Prevention Requirements Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 149-46 | 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-12-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-12-04 SUBJECT HEADING: LOCKHEED Models 49 and 149 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-12-04 LOCKHEED: Applies to All 49 and 149 Aircraft As Specified by Civil Air Regulations Amendments 41-3, 42-2, and 61-2. To be accomplished not later than the dates specified in the above amendments as revised by special Civil Air Regulations Serial Nos. 385, 390, 390A, 390B and any subsequent regulations affecting these compliance dates. All air carrier aircraft must be modified in all necessary respects to comply with the fire prevention requirements outlined in CAR Amendments 41-3, 42-2, and 61-2. Compliance with the requirements may be completed by accomplishing the modifications outlined in the following listed Lockheed Service Bulletins. Other rework shown to be equivalent to that covered by the Service Bulletins will also be acceptable. 49/SB-175, Installation of Cabin Door Louver Covers and Door Stops; 49/SB-179, Inspection and Replacement of Crew Seat Upholstery Covers; 49/SB-180, Rework of Receptacles for Used Towels, Paper, and Waste; 49/SB-181, Rework of Baggage Compartment Lining; 49/SB- 183B, Installation of Smoke Detectors; 49/SB-184, Installation of CO2 Provisions in Cargo Compartment; 49/SB-188, Enclosure of Cabin Heater Fuel Control System Components; 49/SB- 191, Replacement of Firewall and Fire Seal Fittings and Cable Seals; Installation of CO2 Fire Extinguisher Check Valves; 49/SB-153, Sealing of Access Doors in Stub Wing Fillet; 49/SB-216, Relocation of Fenwal Fire Detectors; 49/SI-44, Installation of Metal Main Landing Gear Aft Doors. FOOTER:
Document Text
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AD Final Rules - DRS_48-12-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-12-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Models 49 and 149 Aircraft Subject: Fire Prevention Requirements Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 149-46 | 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: 48-12-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-12-04 SUBJECT HEADING: LOCKHEED Models 49 and 149 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-12-04 LOCKHEED: Applies to All 49 and 149 Aircraft As Specified by Civil Air Regulations Amendments 41-3, 42-2, and 61-2. To be accomplished not later than the dates specified in the above amendments as revised by special Civil Air Regulations Serial Nos. 385, 390, 390A, 390B and any subsequent regulations affecting these compliance dates. All air carrier aircraft must be modified in all necessary respects to comply with the fire prevention requirements outlined in CAR Amendments 41-3, 42-2, and 61-2. Compliance with the requirements may be completed by accomplishing the modifications outlined in the following listed Lockheed Service Bulletins. Other rework shown to be equivalent to that covered by the Service Bulletins will also be acceptable. 49/SB-175, Installation of Cabin Door Louver Covers and Door Stops; 49/SB-179, Inspection and Replacement of Crew Seat Upholstery Covers; 49/SB-180, Rework of Receptacles for Used Towels, Paper, and Waste; 49/SB-181, Rework of Baggage Compartment Lining; 49/SB- 183B, Installation of Smoke Detectors; 49/SB-184, Installation of CO2 Provisions in Cargo Compartment; 49/SB-188, Enclosure of Cabin Heater Fuel Control System Components; 49/SB- 191, Replacement of Firewall and Fire Seal Fittings and Cable Seals; Installation of CO2 Fire Extinguisher Check Valves; 49/SB-153, Sealing of Access Doors in Stub Wing Fillet; 49/SB-216, Relocation of Fenwal Fire Detectors; 49/SI-44, Installation of Metal Main Landing Gear Aft Doors. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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