46-50-01: Fuel line rework

FAA order 46-50-01 is an airworthiness directive. The FAA's subject line: Fuel line rework. It names Waco INF, Waco RNF: about 43 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: fuel system.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Waco Aircraft Company, The
Models: INF, KNF, RNF
On this site: Waco INF 8 registered
Waco RNF 35 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 (624 characters)

46-50-01	WACO:  (Was Special Note 2 of AM-166.)  Applies to Models INF, KNF, MNF, RNF Aircraft.
	Inspection required before next flight - rework (if needed) not later than April 1, 1946.
	Inspect the fuel line (or lines) connecting the fuel strainer and the carburetor to determine that this line is made up of either:
	(a)	Rigid metal tubing with flexible hose connections at each end, or
	(b)	Approved type flexible hose assembly.
	Aircraft found to have fuel line installations not conforming to either (a) or (b) shall be altered to conform as soon as possible.
	(Waco Service Bulletin No. 154 also covers this 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 October 5, 2026. Connections as data: /graph/directive/46-50-01.json · aircraft systems.