47-21-16: Fuel Strainer Drain
FAA order 47-21-16 is an airworthiness directive. The FAA's subject line: Fuel Strainer Drain. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sky Enterprises, Inc.
- Models
- RC-3
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 (685 characters)
47-21-16 REPUBLIC: (Was Mandatory Note 6 of AD-769-2.) Applies to Model RC-3 Aircraft Serial Numbers 5 to 250, Inclusive.
To be accomplished not later than the next 25 hours of operation subsequent to July 1, 1947, and in any case not later than September 1, 1947.
In order to provide a fuel strainer drain which is leakproof and airtight:
1. Remove the existing drain cock or plug from the fuel strainer located near the right hand wing fairing.
2. Install adapter 17P65058-1 in the strainer and install W7600-1/8 drain cock in the end of adapter. Use seal-lube when installing these parts.
(Seabee Service Bulletin No. 7 dated February 5, 1947, covers the 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/47-21-16.json · aircraft systems.