48-12-05: Shear Screw Replacement
FAA order 48-12-05 is an airworthiness directive. The FAA's subject line: Shear Screw Replacement. It names Bell 47: about 478 aircraft on the U.S. register today, 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
- Scotts-Bell 47 Inc
- Models
- 47B, 47B3, 47D
- On this site
- Bell 47 478 registered
Dates and paperwork
- 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 (459 characters)
48-12-05 BELL: Applies to Models 47B Series and 47D.
Compliance required at next 100-hour teardown inspection if less than 600 hours have been accumulated. (If over 600 hours have been accumulated, this change must be accomplished immediately.)
Replace the dural shear screws in the transmission spider assembly with steel shear screws (P/N 47-620-485-1).
(Bell Service Bulletin No. 47C66, revised February 10, 1948, also covers this same subject.)
Related safety bulletins advice on the same designs, not orders
2001-02-09SW-01-13 ·
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/48-12-05.json · aircraft systems.