47-20-02: Oleo Piston
FAA order 47-20-02 is an airworthiness directive. The FAA's subject line: Oleo Piston. It names American Champion Aircraft 7 Citabria and Champ: about 429 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- American Champion Aircraft Corp.
- Models
- 11AC, 7AC
- On this site
- American Champion Aircraft 7 Citabria and Champ 429 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 (494 characters)
47-20-02 AERONCA: (Was Mandatory Note 2 of AD-761-2 and Mandatory Note 2 of AD-759-3.) Applies to 7AC Airplanes Having Serial Numbers 226 to 3721; and 11AC, Serial Numbers 1 to 351.
Compliance required at next periodic inspection but not later than August 1, 1947.
To prevent the oleo strut assembly from separating in flight, replace the fiber piston with aluminum pistons. (Supplementary to Aeronca Service Helps and Hints No. 12 dated February 11, 1947, covers this same subject.)
Related safety bulletins advice on the same designs, not orders
2018-07-12CE-18-20 · Electrical Power
2013-07-12CE-13-40 · Flight Compartment
2011-07-06CE-11-43 · Flight Controls
2010-07-23CE-10-39 · Equipment - Furnishings
2009-03-20CE-09-20 · Equipment - Furnishings
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/47-20-02.json · aircraft systems.