68-20-06: Rudder Horn Inspection
FAA order 68-20-06 is an airworthiness directive in force since October 3, 1968. The FAA's subject line: Rudder Horn Inspection. It names Navion NAVION D, Navion NAVION F, Navion NAVION G, Navion NAVION H: about 108 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sierra Hotel Aero, Inc.
- Models
- Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G, Navion H, Navion (Army L-17A)
- On this site
- Navion NAVION D 5 registered
Navion NAVION F 6 registered
Navion NAVION G 61 registered
Navion NAVION H 36 registered
Dates and paperwork
- In force since
- October 3, 1968
- 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 (682 characters)
68-20-06 NAVION: Amendment 39-663. Applies to Navion through Navion H airplanes.
Compliance required within the next 50 hours time in service after the effective date of this AD, and each annual inspection thereafter.
To prevent failure of the Rudder Horn, P/N 145-24401, accomplish the following:
Inspect for horizontal cracks or corrosion in the edge of the rudder horn. These cracks would appear as delaminations or swelling under the paint. Replace corroded or cracked rudder horns with new or unused part of the same part number or Federal Aviation Administration approved equivalent part before further flight.
This amendment becomes effective October 3, 1968.
Related safety bulletins advice on the same designs, not orders
2022-05-27AIR-22-13 · Landing Gear Components
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2007-03-14CE-06-11R1 · Fuel system selector valves
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/68-20-06.json · aircraft systems.