# 2026-16506: Airbus Helicopters Get Stricter Maintenance Bible Tweaks

2026-16506, Airworthiness Directives; Airbus Helicopters, is a Federal Register rule from Transportation Department, Federal Aviation Administration published 2026-08-13, effective 2026-09-17; PRIA reads it as touching household money (as of 2026-08-20).

- Canonical: https://policyrisk.com/federal-register/2026-16506
- As of: 2026-08-20
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16506
- Title: Airworthiness Directives; Airbus Helicopters
- Type: Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 52219
- Published: 2026-08-13
- Effective: 2026-09-17
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-08-20

## In one line

Airbus Helicopters Get Stricter Maintenance Bible Tweaks

## Summary

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC 155 B and EC 155 B1 helicopters. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD requires revising the airworthiness limitations section (ALS) of the existing maintenance manual (MM) or instructions for continued airworthiness (ICA) and the existing approved maintenance or inspection program, as applicable. The FAA is issuing this AD to address the unsafe condition on these products.

## Effects PRIA read

- Must revise maintenance limits in 30 days: cost, low. If you operate an Airbus Helicopters Model EC 155 B or EC 155 B1, you must revise the airworthiness limitations section (ALS) of the maintenance manual or instructions for continued airworthiness and the approved maintenance/inspection program within 30 days after the AD’s effective date of Septemb…
- New limits to prevent structural failures: benefit, high. The AD requires adoption of new or more restrictive airworthiness limitations to prevent failure of certain parts and primary structural components that could lead to loss of control of the helicopter. The AD incorporates EASA AD 2025-0191 procedures for replacing components before life limits are…

## Related documents

- [2026-15585](https://policyrisk.com/federal-register/2026-15585): Requirements for Interference-Tolerant Radio Altimeter Systems, 2026-07-31
- [2026-13440](https://policyrisk.com/federal-register/2026-13440): Enabling Supersonic Overland Flight, 2026-07-02
- [2026-13126](https://policyrisk.com/federal-register/2026-13126): Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility; Extension of Comment Period, 2026-06-30
- [2026-08943](https://policyrisk.com/federal-register/2026-08943): Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility, 2026-05-06
- [2025-04846](https://policyrisk.com/federal-register/2025-04846): Extension of the Prohibition Against Certain Flights in the Territory and Airspace of Libya, 2025-03-20
- [2025-03853](https://policyrisk.com/federal-register/2025-03853): Enforcement Policy Regarding “Drug and Alcohol Testing of Certificated Repair Station Employees Located Outside of the United States; Corre…, 2025-03-11

## Sources
- [2026-16506 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/13/2026-16506/airworthiness-directives-airbus-helicopters)
- [2026-16506 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-13/pdf/2026-16506.pdf)

## Related
- [Previous: 2026-16505, Airworthiness Directives; Airbus Helicopters](https://policyrisk.com/federal-register/2026-16505)
- [Next: 2026-16507, Airworthiness Directives; Airbus Helicopters](https://policyrisk.com/federal-register/2026-16507)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-16506 (as of 2026-08-20).