# AD 48-12-04: Fire Prevention Requirements

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 149-46 and 49-46
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6F1DD8A50208AD568625696D0071A382.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-12-04

## The airworthiness directive

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 ofBaggage 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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 2 of 6 models: 149-46, 49-46

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (1 by airframe model, 0 by engine model)
- Makers: Lockheed 1

Models with the most aircraft:

- [Lockheed 49-46](https://openairdocs.org/model/lockheed-49-46): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/48-12-04/models.md
Every aircraft: https://openairdocs.org/ad/48-12-04/aircraft.md

Its text cites no advisory circulars or STCs.

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