# Airworthiness Directives; Airbus Helicopters

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Federal Aviation Administration |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-08-14 |
| Effective | 2026-09-18 |
| Significant | No |
| CFR parts | 14 CFR 39 |
| Summary | The FAA is superseding Airworthiness Directive (AD) 2023-25- 14, which applied to certain Airbus Helicopters Model EC130T2 helicopters. AD 2023-25-14 revised the procedures for inspecting the vibration level on the tail rotor drive shaft and, depending on these results, required replacing certain parts. Since the FAA issued AD 2023-25-14, the manufacturer developed a modification of the rear drive shaft, sliding flange, and equipped splined sleeve. This AD requires installing this modification and repetitively inspecting the vibration level of the tail rotor drive shaft. This AD also prohibits |
| Document number | 2026-16641 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/08/14/2026-16641/airworthiness-directives-airbus-helicopters). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.