50-05-01: Nicopress Sleeve Rework
FAA order 50-05-01 is an airworthiness directive published June 17, 1950. The FAA's subject line: Nicopress Sleeve Rework. It names Piper J-3 Cub, Piper PA-11 Cub Special, Piper PA-12 Super Cruiser: about 5,494 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
- Piper Aircraft Inc.
- Models
- PA-12, PA-12S, J3C-40, J3C-50, J3C-50S, J3C-65S, PA-11, PA-11S, J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2))
- On this site
- Piper J-3 Cub 3,804 registered
Piper PA-11 Cub Special 443 registered
Piper PA-12 Super Cruiser 1,247 registered
Dates and paperwork
- Published
- June 17, 1950
- 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 (986 characters)
50-05-01 PIPER: Applies to All J3C, PA-11, PA-12 Aircraft Manufactured Between November 1945 and November 1946 Inclusive.
Compliance required at next periodic inspection but not later than March 1, 1950.
In order to minimize the possibility of understrength Nicopress sleeves in the control system, check the major dimension of the pressed portions of all sleeves. If this dimension exceeds 0.353 inch, the sleeve should be repressed to this dimension by two presses with National Telephone Supply Co.'s hand tool 51-M-850. The go-gage furnished with the tool may be used to check the 0.353-inch dimension. In repressing the sleeves, the hand tool used should be carefully adjusted in accordance with the manufacturer's instructions and the sleeves should be recompressed with the larger axis in the same plane as during the original press.
If new Nicopress sleeves are installed, three presses with the hand tool should be used as recommended by the sleeve manufacturer.
Related safety bulletins advice on the same designs, not orders
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
1998-10-21ACE-99-01 ·
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/50-05-01.json · aircraft systems.