Airworthiness Directive · Amendment 39-23137 · Engine fuel/oil cooler
Bell Textron Canada Limited Helicopters
This AD applies to Bell Textron Canada Limited Model 505 helicopters, serial numbers 65011 through 65020 inclusive and 65022 through 65027 inclusive, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of a crack on the mounting bracket on the oil cooler fan assembly housing. This AD requires a one-time visual inspection for cracks on the mounting bracket on the oil cooler fan assembly housing and modification of the mounting bracket. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2025-23, dated April 23, 2025 (Transport Canada AD CF-2025-23).
(1) Where Transport Canada AD CF-2025-23 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2025-23 requires compliance in terms of air time, this AD requires using hours time-in-service.
(3) Where Transport Canada AD CF-2025-23 specifies “Within 25 hours air time or 30 days from the effective date of this AD”, this AD requires replacing that text with “Within 25 hours time-in-service or 30 days from the effective date of this AD, whichever occurs first”.
(4) Where paragraph 1. of Transport Canada AD CF-2025-23 specifies “conduct a visual inspection of the right bracket of the oil cooler blower housing”, this AD requires replacing that text with “conduct a visual inspection and, if applicable, a gap measurement of the right bracket of the oil cooler blower housing”.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
