Airworthiness Directive · Amendment 39-23173 · Aircraft fuel system
Cameron Balloons Ltd. Fuel Cylinders
(1) This AD applies to all hot air balloons, certificated in any category, with a fuel cylinder installed that is fitted with Cameron Balloons Ltd. pressure relief valve (PRV) adaptor part number (P/N) CB8426.
Note 1 to paragraph (c)(1): Cameron Balloons Alert Service Bulletin No. 36, Revision 2, dated July 3, 2025, provides information related to this AD, including fuel cylinders that may be fitted with PRV adaptor P/N CB8426.
(2) These fuel cylinders are installed on hot air balloon models including, but not limited to, those of the design approval holders identified in paragraphs (c)(2)(i) through (viii) of this AD.
(i) Adams Aerostats LLC.
(ii) Aerostar International Inc.
(iii) Ballonbau Wörner GmbH.
(iv) Cameron Balloons Ltd.
(v) Eagle Balloons Corp.
(vi) JR Aerosports, Ltd.
(vii) Kubíček Factory s.r.o. (formerly Balóny Kubíček spol. s.r.o.).
(viii) Lindstrand Balloons Ltd.
The FAA is superseding Airworthiness Directive (AD) 2025-11- 10, which applied to Cameron Balloons Ltd. (Cameron) fuel cylinders fitted with certain pressure relief valve (PRV) adaptors on hot air balloons. AD 2025-11-10 required repetitively visually checking the PRV adaptor for cracks and removing any fuel cylinder with a cracked PRV adaptor from service. Since the FAA issued AD 2025-11-10, a new replacement part was introduced into service. This AD retains the repetitive check and removal requirements of AD 2025-11-10 and also requires replacement of the PRV adaptor as terminating action for the repetitive checks. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Before further flight after the effective date of this AD and thereafter before each flight, visually check the fuel cylinder PRV adaptor for any cracks.
(2) The owner/operator (pilot) holding at least a private pilot certificate may perform the visual checks required by paragraph (g)(1) of this AD and must enter compliance with the applicable paragraph of this AD into the balloon 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.
(3) Replace the fuel cylinder PRV adaptor with a fuel cylinder PRV adaptor having P/N CB7922 at whichever compliance time in paragraph (g)(3)(i) or (ii) occurs first.
(i) Before further flight if any crack is found during any visual check required by paragraph (g)(1) of this AD.
(ii) At or before the next scheduled periodic PRV inspection.
(4) The replacement required by paragraph (g)(3) of this AD terminates the repetitive visual check requirement of paragraph (g)(1) of this AD.
