AD 2026-04-03: Leonardo S.p.A. Helicopters

What the FAA requires

The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.A. Model AB139 and AW139 helicopters. This AD was prompted by a report of interference found in the overhead panel area between the electrical cables and adjacent connectors. This AD requires repetitively inspecting the overhead panel and, depending on the results, repairing or replacing the damaged wires. This AD also requires modifying the overhead panel on certain helicopters. The FAA is issuing this AD to address the unsafe condition on these products.

Read the full directive on the Federal Register →

Applicability

This AD applies to all Leonardo S.p.A. Model AB139 and AW139 helicopters, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 2497, Electrical Power System Wiring. (e) Unsafe Condition This AD was prompted by a report of interference found in the overhead panel area between the electrical cables and adjacent connectors. The FAA is issuing this AD to detect and address chafing of the electrical cables. The unsafe condition, if not addressed, could result in chafing of the electrical cables which could lead to a fire in the overhead panel with consequent loss of control of the helicopter. (f) Compliance Comply with this AD within the compliance times specified

Part numbers this directive names

This directive does not name specific part numbers in its text; it applies by aircraft model. See the applicability above and the manufacturer's service bulletin it references.