# AD 59-01-03: Split Rings

- Type: Airworthiness directive
- Status: Current
- Products: Hartzell Propeller HC-12X20-1, HC-12X20-2, HC-12X20-3, HC-12X20-4, HC-12X20-5, HC-12X20-6, HC-12X20-7, HC-12X20-8, HC-12X20-9, HC-13X20-5, HC-13X20-6, HC-13X20-8 and 24 more
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3562D8AAF488B17186256965004DD138.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/59-01-03

## The airworthiness directive

59-01-03 HARTZELL: Applies to HC-12X20, HC-13X20, HC-82X and HC-83X Series Propellers With Hub Serial Numbers As Indicated Herein.

Compliance required as indicated.

To minimize the possibility of failure of the split rings used to retain the blades in the hub, replace (if not previously accomplished) all unmarked split rings with new split rings marked with the letter "N", as follows:

  (1) Prior to February 15, 1959.

HUB MODEL HUB SERIAL NO. INCLUSIVE HC-82XF-1DB, -1BB T-913 to T-2891 HC-82XF-2B F-400 to F-1675

  (2) Prior to April 15, 1959.

HUB MODEL HUB SERIAL NO. INCLUSIVE HC-82X20-1B C-104 to C-267 HC-12X20-7D, 7C, 7E R-118 to R-260 HC-12X20-8D, 3C, 3E P-157 to P-494 HC-83X20-2C D-448 to D-1530 HC-83XF-2A U-105 to U-437 HC-83X20-2CL V-104 to V-179 HC-13X20-6L X-101 to X-111

  (3) Prior to June 1, 1959.

HUB MODEL HUB SERIAL NO. INCLUSIVE HC-82XG-1D G-102 to G-305 HC-82XG-2B K-592 to K-2919 HC-82XL-1D100-Y to 121-Y HC-82XG-6B 100D to 169D

After compliance, stamp the letter "N" after the hub serial number. This letter "N" should be stamped on propellers already modified. Serial numbers of propellers modified at the factory are listed in Hartzell Bulletin No. 64. The aircraft log book should contain this information for propellers modified in the field.

(Hartzell Bulletin No. 64 covers this same subject.)

## Affected data sheets (4) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P-878](https://openairdocs.org/tcds/P-878): Hartzell Propeller Inc.; names 17 of 17 models: HC-82XF-1, HC-82XL-6, HC-82XF-6, HC-82X20-5, HC-82XF-3, HC-82XG-2, HC-82XG-1, HC-82-XK-2…
- [TCDS P-845](https://openairdocs.org/tcds/P-845): Hartzell Propeller Inc.; names 9 of 9 models: HC-12X20-7, HC-12X20-5, HC-12X20-6, HC-12X20-4, HC-12X20-9, HC-12X20-3, HC-12X20-2, HC-12X20-1…
- [TCDS P-884](https://openairdocs.org/tcds/P-884): Hartzell Propeller Inc.; names 7 of 7 models: HC-83XK-2, HC-83XK-1, HC-83XF-1, HC-83XF-3, HC-83XF-2, HC-83X20-1, HC-83X20-2
- [TCDS P-888](https://openairdocs.org/tcds/P-888): Hartzell Propeller Inc.; names 3 of 3 models: HC-13X20-8, HC-13X20-6, HC-13X20-5

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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