2026-18468Proposed RuleWallet

FAA Orders Bell 505 Tailcone Inspections to Avert Mid-Air Mishaps

Published Date: 9/10/2026

Proposed Rule

Summary

The FAA wants Bell Model 505 helicopter owners to check and replace certain tailcone parts that might be unsafe due to a quality problem. They’ll need to inspect for gaps and loose fasteners regularly and fix any issues found. Comments on this plan are open until October 26, 2026, and these actions help keep flights safe without breaking the bank.

Analyzed Economic Effects

4 provisions identified: 1 benefits, 3 costs, 0 mixed.

Mandatory Tailcone Replacement When Life Limit Exceeded

The proposed AD would require replacing any tailcone assembly that has exceeded its airworthiness life limit. The FAA estimates replacing a tailcone costs 30 work-hours (30 x $85/hr = $2,550) plus $54,280 in parts, for a total estimated cost per replacement of $56,830.

Estimated U.S. Fleet Compliance Costs

The FAA estimates this AD would affect 190 U.S.-registered Bell Model 505 helicopters. Estimated costs to U.S. operators are $64,600 for the gap inspections (190 × $340), $48,450 for the fastener inspections (190 × $255), and a potential $10,797,700 if all 190 helicopters required a tailcone replacement (190 × $56,830).

Safety Benefit: Prevent Tailboom Separation

The AD aims to detect and correct crack initiation in the tailboom skin to prevent a tailboom skin fracture and possible separation from the fuselage, which could cause loss of control of the helicopter. The requirement to inspect and replace affected tailcone assemblies is intended to address that unsafe condition.

Required Tailcone Inspections and Checks

If you operate a Bell Model 505 helicopter on the U.S. registry, you must inspect the tailcone assembly for gaps and repetitively inspect for loose, damaged, or missing fasteners. The FAA estimates the initial gap inspection takes 4 work-hours (4 x $85/hr = $340) and the fastener inspection takes 3 work-hours (3 x $85/hr = $255); repetitive on-condition inspections are estimated at 1 work-hour ($85).

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Key Dates

Published Date
Comments Due
9/10/2026
10/26/2026

Department and Agencies

Department
Independent Agency
Agency
Transportation Department
Federal Aviation Administration
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