47-42-02: Cowling Fire Seal
FAA order 47-42-02 is an airworthiness directive. The FAA's subject line: Cowling Fire Seal. It names Douglas C-54: about 7 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: airframe structure.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- The Boeing Company
- Models
- C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, DC-4
- On this site
- Douglas C-54 7 registered
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (922 characters)
47-42-02 DOUGLAS: (Was Mandatory Note 21 of AD-762-7.) Applies to C-54 and DC-4 Aircraft. \n\nTo be accomplished as soon as possible but in any case not later than the first engine change after November 15, 1947. \n\nIt has been found that on some airplanes certain rework has been accomplished on the fire seal between the accessories section and the nacelle at the upper cowling former at the point where the carburetor airscoop skin rests on top of the firewall. This rework creates a hazardous condition by providing an opening from the accessories section into the nacelle, through the access hole under the non-ram air intake fairing. \n\nInspect all airplanes to ascertain that a fire seal is provided in this area. If the cowling fire seal has been cut away it must be replaced either with the original type seal or with a new type seal. \n\n(Douglas Service Bulletin DC-4 No. 19 covers a new type fire seal.)
Related safety bulletins advice on the same designs, not orders
2014-11-24NM-15-03 · Flight Controls
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/47-42-02.json · aircraft systems.