# Airworthiness Directives; Various Helicopters

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Federal Aviation Administration |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-08-06 |
| Effective | 2026-09-10 |
| Significant | No |
| CFR parts | 14 CFR 39 |
| Summary | The FAA is superseding Airworthiness Directive (AD) 2015-20-12 for certain Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM, R, and V; Croman Corporation Model SH-3H; Carson Helicopters, Inc., Model S-61L and SH-3H; Glacier Helicopter, Inc., Model CH-3E; Robinson Air Crane, Inc., Model CH-3E, CH-3C, HH-3C and HH-3E; and Siller Helicopters Model CH-3E and SH-3A helicopters. AD 2015-20-12 required performing calculations to determine whether the main rotor shaft (MRS) was used in repetitive external lift (REL) operations or non-REL operations, performing a nondestructive inspection (NDI |
| Document number | 2026-15978 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/08/06/2026-15978/airworthiness-directives-various-helicopters). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.