47-43-10: Fire Extinguisher Bottle Rework
FAA order 47-43-10 is an airworthiness directive. The FAA's subject line: Fire Extinguisher Bottle Rework. It names Lockheed 18: about 13 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Lockheed Aircraft Corporation
- Models
- 18
- On this site
- Lockheed 18 13 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 (897 characters)
47-43-10 LOCKHEED: (Was Mandatory Note 21 of AD-723-3.) Applies to All Model 18 Serial Numbers.
Compliance required prior to February 1, 1948.
Inspect all Alfite Model 2CD1722 operating heads for the CO2 bottles (fire extinguishing system) and nitrogen bottles (emergency landing gear extension system) to determine whether these heads have been stamped with the letter "L" adjacent to the swivelnut. If the head is not marked in this manner, disassemble the head and examine the cable sheave for part number. All 2CD2248 sheaves should be reworked by rounding the inner shoulder of the ramp at its lower end throughout a distance of 1 1/4 inches, to eliminate possible jamming of the mechanism. When reworked sheaves are installed, the operating heads should be identified by the letter "R" stamped adjacent to the swivelnut.
(Lockheed Service Bulletin 18/SB-140 covers this same subject.)
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/47-43-10.json · aircraft systems.