- Models
- HC-12X20-1, HC-12X20-2, HC-12X20-3, HC-12X20-4, HC-12X20-5, HC-12X20-6 and 3 more
- Data sheet
- TCDSP-845
- Product
- Propeller
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 19 KB | 2c7e8e1a…ec09422 | FAA DRS (API key needed) |
On this page
The airworthiness directive
59-26-01 HARTZELL: Applies to All HC-12X20 Propellers With Serial Numbers As Indicated Below. These Propellers May Be Installed On Such Aircraft Models As Downer (Republic) RC-3, Grumman G-44, and Navion Series.
Compliance required not later than March 1, 1960.
To preclude possible failures, remove from service Hartzell hub spiders with Serial Numbers 1 through 4303, 4307 through 4316, 4318, 4319, 4321, 4323, 4324, 4325, 4328, 4329, 4332 through 4336, 4341. After removal, these hub spiders will not be eligible for use in certificated aircraft.
Hub spiders with serial numbers other than those listed may be used as replacements.
This supersedes AD 53-06-02.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.