2011-22-51: Tail Rotor Gearbox
Emergency order 2011-22-51 is an airworthiness directive. The FAA's subject line: Tail Rotor Gearbox. It names Sikorsky S-70: about 29 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: rotorcraft systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Sikorsky Aircraft Corporation
- Models
- S-70, S-70A, S-70C, S-70C(M), S-70C(M1)
- On this site
- Sikorsky S-70 29 registered
Dates and paperwork
- Docket
- Unknown
- Replaced by
- 2012-22-14
- Status
- Historical
- The FAA's document
- Read the order on the FAA's site
Related safety bulletins advice on the same designs, not orders
2006-04-04SW-06-36 ·
2004-08-04SW-04-75 ·
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 October 7, 2026. Connections as data: /graph/directive/2011-22-51.json · aircraft systems.