AD 59-01-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hartzell Propeller, Inc. | HC-12X20-1 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-2 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-3 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-4 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-5 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-6 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-7 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-8 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-12X20-9 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
| aircraft | Hartzell Propeller, Inc. | HC-13X20-5 | HARTZELL Models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers |
Unsafe Condition
Failure of the split rings used to retain the blades in the hub.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace unmarked split rings with new split rings marked with the letter 'N' and stamp the letter 'N' after the hub serial number. The aircraft log book must contain information for propellers modified in the field.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to February 15, 1959; April 15, 1959; or June 1, 1959, depending on the hub model and serial number range.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hartzell Propeller, Inc. models HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers with specific hub models and serial number ranges as listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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