# AD 46-50-01: Fuel line rework

- Type: Airworthiness directive
- Status: Current
- Products: Waco Aircraft Company, The INF, KNF and RNF
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 46 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2C885AD59A5B300286256A4D004AD655.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/46-50-01

## The airworthiness directive

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.)

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS ATC 311](https://openairdocs.org/tcds/ATC%20311): The Waco Aircraft Company; names 1 of 1 models: RNF
- [TCDS ATC 313](https://openairdocs.org/tcds/ATC%20313): The Waco Aircraft Company; names 1 of 1 models: KNF
- [TCDS ATC 345](https://openairdocs.org/tcds/ATC%20345): The Waco Aircraft Company; names 1 of 1 models: INF

## 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: 46 (46 by airframe model, 0 by engine model)
- Makers: Waco 46

Models with the most aircraft:

- [Waco RNF](https://openairdocs.org/model/waco-rnf): 35 aircraft (airframe model)
- [Waco INF](https://openairdocs.org/model/waco-inf): 8 aircraft (airframe model)
- [Waco KNF](https://openairdocs.org/model/waco-knf): 3 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/46-50-01/models.md
Every aircraft: https://openairdocs.org/ad/46-50-01/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.