Airworthiness Directive · Amendment 39-23472 · Emergency locator beacon
Hélicoptères Guimbal Helicopters
This AD applies to Hélicoptères Guimbal (HG) Model Cabri G2 helicopters having serial numbers (S/N) 1003 to 1389, except S/N 1383 and 1388, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain H[eacute]licopt[egrave]res Guimbal (HG) Model Cabri G2 helicopters. This AD was prompted by a report of a potential malfunction of the helicopter emergency locator transmitter (ELT) and subsequent findings of weak ELT signals on 121.5 MHz and 406 MHz frequencies due to improper antenna installation (location). This AD requires revising the existing rotorcraft flight manual (RFM) for the helicopter. The FAA is issuing this AD to address the unsafe condition on these products.
Required Actions
Within 30 days after the effective date of this AD, revise the limitations section of the existing rotorcraft flight manual (RFM) for the helicopter by inserting the following text: “For Cabri G2 not equipped with the external ELT antenna: Operations conducted overwater under 14 CFR part 135 are prohibited pursuant to 14 CFR 135.168”.
(1) Inserting a copy of this AD into the limitation section of the RFM satisfies the requirements of paragraph (g) of this AD.
(2) The owner/operator (pilot) holding at least a private pilot certificate may revise the existing RFM for the helicopter and must enter compliance into the helicopter maintenance records in accordance with 14 CFR 43.9(a) and 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417, 121.380, or 135.439.
(1) For internal ELT antenna helicopters, as a terminating action, you may modify the ELT antenna and relocate and install a new VHF2 antenna (if installed) in accordance with section 2 ELT Antenna Installation through section 4 Engine Cowl Honeycomb Repair and section 6 Final Steps of Guimbal Mandatory Service Bulletin SB 25-006 B, dated December 12, 2025 (Guimbal SB 25-006 B), except as provided in paragraphs (h)(1)(i) and (ii) of this AD.
(i) Instead of discarding parts, you must remove those parts from service.
(ii) Where Guimbal SB 25-006 B uses the term check, this AD requires doing an inspection.
(2) Upon completion of paragraph (h)(1) of this AD, revise the RFM by removing the limitation identified in paragraph (g) of this AD.
