47-50-06: Shock Strut Cracks
FAA order 47-50-06 is an airworthiness directive published June 17, 1950. The FAA's subject line: Shock Strut Cracks. It names Piper J-3 Cub, Piper PA-11 Cub Special: about 4,247 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: landing gear.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Piper Aircraft Inc.
- Models
- J3C-65S, PA-11, 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
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 (963 characters)
47-50-06 PIPER: Applies to All J3C-65 Series Airplanes Incorporating Landing Gear Approved for 1,220 Pounds Maximum Weight and PA-11 Airplane Serial Numbers 11-1 to 11- 352, Inclusive; 11-354 to 11-357, Inclusive; 11-359, 11-361 to 11-369, Inclusive; 11-371 to 11- 375, Inclusive; 11-377 to 11-385, Inclusive; 11-387, 11-396 to 11-402, Inclusive; 11-413, 11-414 and 11-430.
Compliance required at the next periodic inspection but not later than March 15, 1948.
Inspect the shock struts for cracks at the ends of the stop bolt slots. Damaged struts shall be properly repaired or replaced. To eliminate possible cracking of the shock struts at the ends of the slots, the rubber stop discs, Piper P/N 81232-13, four per airplane, shall be replaced with four leather discs, Piper P/N 81232-30 or may be made from belting leather, 11/16-inch diameter x 3/16-inch thick.
(Piper Service Bulletin No. 103 dated September 29, 1947, covers this same subject.)
Related safety bulletins advice on the same designs, not orders
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/47-50-06.json · aircraft systems.