59-17-06: Pulley Guards
FAA order 59-17-06 is an airworthiness directive. The FAA's subject line: Pulley Guards. It names Helio H-391, Helio H-395: about 33 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Helio Aircraft LLC
- Models
- H-391B, H-395 (USAF L-28A or U-10B)
- On this site
- Helio H-391 16 registered
Helio H-395 17 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 (688 characters)
59-17-06 HELIO: Applies to All Model H-391B Aircraft and Model H-395, Serial Number 075 and 502 Through 509 Inclusive.
Compliance required within next 100 hours or by November 1, 1959, whichever occurs first.
Install additional pulley guards at three 3-inch stabilator control system pulleys located at:
(a) The upper left-hand corner of the fuselage truss just aft of the firewall.
(b) Just forward of the lower left-hand side of the instrument panel.
(c) Directly under the forward attach point of the vertical stabilizer in the aft portion of the tail cone.
(The cable makes a 180 degree turn around this pulley.)
(Helio Service Bulletin No. 20 covers this subject.)
Related safety bulletins advice on the same designs, not orders
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2018-05-09CE-18-14 · Main Landing Gear: Improved inspection at Drag Brace Location
2008-09-09CE-08-47 · Wings - Attachment Fittings
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/59-17-06.json · aircraft systems.