Federal Register #FAA20267219

FAA Proposes Airworthiness Directives for Rolls-Royce BR700-725A1-12 Engines and Bell 407 Helicopters

This opportunity involves proposed airworthiness directives (ADs) from the Federal Aviation Administration (FAA), part of the Department of Transportation, targeting two major OEMs: - Government Buyer: - Department of Transportation, Federal Aviation Administration (FAA), Aircraft Certification Service, Airworthiness Products Section - OEMs and Vendors Mentioned: - Rolls-Royce Deutschland Ltd & Co KG - Bell Textron Canada Limited - Products/Services Requested: - For Rolls-Royce Deutschland Ltd & Co KG Model BR700-725A1-12 engines: - Revise the airworthiness limitations section (ALS) of the approved engine maintenance or inspection program - Incorporate new or more restrictive thresholds and intervals for life-limited parts - Applies to approximately 758 engines (part number BR700725A112) - For Bell Textron Canada Limited Model 407 helicopters: - Perform repetitive inspections and torque checks of the tailboom attachment structure - Replace attachment hardware as required - Conduct detailed inspections of the tail boom assembly and aft fuselage structure as a terminating action - Prohibit use of certain longeron assemblies - Revise ALS to include new life limits for tail boom attachment bolts - Unique or Notable Requirements: - Compliance is regulatory, not a purchase of goods or services - Operators must update maintenance and inspection programs to meet new safety standards - For Rolls-Royce engines, compliance is required within 30 days after the directive's effective date - For Bell helicopters, specific inspection and hardware replacement protocols are mandated

Description

The FAA proposes a new airworthiness directive for all Rolls-Royce Deutschland Ltd & Co KG Model BR700-725A1-12 engines. This proposed AD is prompted by revisions to the airworthiness limitations section of the existing time limits manual to introduce new or more restrictive airworthiness limitations and associated thresholds and intervals for life-limited parts. The directive requires revising the operator's maintenance or inspection program to incorporate these new or more restrictive instructions. Comments on this NPRM must be received by August 31, 2026.

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