49-33-01: Hamilton Standard Propeller Blades
FAA order 49-33-01 is an airworthiness directive. The FAA's subject line: Hamilton Standard Propeller Blades. System: propeller.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- The Boeing Company
- Models
- DC-6, DC-6A, DC-6B
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 (618 characters)
49-33-01 DOUGLAS: Applies to All Model DC-6 Airplanes Equipped With Hamilton Standard Model 43D60/6851A-O Props. \n\n\tCompliance required not later than September 10, 1949. \n\n\tAs a precautionary measure against fatigue failure, Hamilton Standard Model 43D60/6851A-O propeller blades may not be operated in excess of 3,500 hours unless the taper-bores have been remachined and reshotpeened by the manufacturer. In addition, any blades of this model which have sustained damage sufficient to change their face or edge alignment shall be withdrawn from service pending final results of manufacturer's test program.
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/49-33-01.json · aircraft systems.