Airworthiness directives › 2025-21-01
AD 2025-21-01 Airworthiness Directives; Cameron Balloons Ltd. Fuel Cylinders
Applicability*9
(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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(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.
Unsafe condition
This AD was prompted by cracks on the upper hex portion of PRV adaptors installed on certain Cameron Balloons Ltd. fuel cylinders. The FAA is issuing this AD to address failure of a PRV adaptor. This condition, if not addressed, could lead to uncontrolled leakage of liquefied petroleum gas, which could result in an in-flight fire and consequent emergency landing.
Affected ADs
This AD replaces AD 2025-11-10, Amendment 39-23056 (90 FR 23269, June 2, 2025) (AD 2025-11-10).
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