{"id":"F2006B03555","name":"AD/BAL/17 - Turning Vents - Cameron Balloons Ltd (Thunder and Colt)","slug":"ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43122,"registerId":"commonwealth-F2006B03555-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BAL/17 - Turning Vents - Cameron Balloons Ltd (Thunder and Colt)","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nHot Air Balloons\n\nAD/BAL/17 Turning Vents \\- Cameron Balloons Ltd\n\n(Thunder and Colt)\n\n  \n12/96\n\nApplicability: All Thunder, Colt, and Thunder and Colt envelopes fitted with turning vents, and with a Constructors number lower than 3550; (all Oswestry built envelopes).\n\nRequirement: Action in accordance with Cameron Balloons (Thunder and Colt) SB No.2 Issue 1 Rev.C.\n\nNote: UK CAA AD 001-07-96 refers.\n\nCompliance: Inspect within 10 hours time in service after 18 September 1996; and if required, repair within twenty hours time in service after 18 September 1996.\n\nThe inspection only, may be carried out by the pilot in command, in which case an entry is to be made, and certified, in the appropriate section of the approved Balloon Log Book.\n\nBackground: This Directive is raised to ensure that certain hot air balloons equipped with turning vent have adequate reinforcing at the upper and lower ends of the vents.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope aligns with its stated purpose in the Background: it targets specific Thunder and Colt envelopes with turning vents and constructor numbers below 3550 and prescribes inspection and repair steps to ensure vent reinforcing. The instrument sets specific timeframes and directs compliance to a manufacturer's service bulletin, consistent with the stated objective."},"complexity_factors":["Narrow applicability limited to specific models and constructor numbers (Applicability)","Mandated reliance on an external document (Cameron Balloons SB No.2 Issue 1 Rev.C) for the required work (Requirement)","Short, concrete time windows for inspection and repair (Compliance)","Conditional repair obligation ('if required') creating outcome-dependent costs (Compliance)","Pilot-performed inspection option with log-book certification requirement (The inspection only...)","Reference to an overseas airworthiness directive for context (Note)"],"plain_english_summary":"What this instrument does (mechanics)\n\n- It requires owners/operators of certain Cameron Thunder and Colt hot air balloon envelopes to inspect and, if necessary, repair the turning vents. (Applicability; Requirement)\n- The inspection and any required repair must follow the manufacturer's instructions in \"Cameron Balloons (Thunder and Colt) SB No.2 Issue 1 Rev.C.\" (Requirement)\n- Inspections must be done within 10 hours time in service after 18 September 1996; any required repairs must be completed within 20 hours time in service after that date. (Compliance)\n- The inspection alone may be carried out by the pilot in command; if so, the pilot must make and certify an entry in the approved Balloon Log Book. (The inspection only...)\n\nWho this affects\n\n- Owners and operators of all Thunder, Colt, and Thunder and Colt envelopes that have turning vents and have a constructor's number lower than 3550 (all Oswestry-built envelopes). (Applicability)\n- Pilots who operate those specific envelopes: they may perform the inspection themselves and must record it in the log book if they do. (The inspection only...)\n- Maintenance providers and the manufacturer: the required repair actions are to be carried out in accordance with Cameron Balloons' service bulletin. (Requirement)\n\nWhy it matters (stated purpose and practical implications)\n\n- The stated reason for the directive is to ensure that envelopes equipped with turning vents have adequate reinforcing at the upper and lower ends of the vents. (Background)\n\nPractical compliance and economic effects (incentives, costs, trade-offs, and implementation points)\n\n- Who pays: Owners/operators bear the direct costs of carrying out the inspection and of any required repairs (Compliance; Requirement).\n- Timing pressure: The directive imposes short compliance windows (inspect within 10 hours TIS; repair within 20 hours TIS), which can reduce availability of affected balloons until work is done and could impose operational disruption or opportunity cost for operators. (Compliance)\n- Method constraints and discretion: Repairs must follow the manufacturer's service bulletin. That requirement prescribes the method of repair and therefore can limit how repairs are performed and by whom (for example, whether a particular repairer or facility is appropriate will depend on what the SB specifies). (Requirement)\n- Reduced procedural burden for inspection: Allowing the pilot in command to carry out the inspection lowers immediate inspection costs and avoids mandatory use of a maintenance organisation for that step, but it requires a formal log-book entry and certification when the pilot performs it. (The inspection only...)\n- Uncertainty and conditionality: The repair obligation is conditional — repairs are required \"if required\" after inspection — which means cost depends on what the inspection finds. (Compliance)\n- Record-keeping and certification: The pilot-performed-inspection option shifts some compliance record-keeping and certification responsibility onto operators/pilots. (The inspection only...)\n- Cross-reference to other authority: The directive notes a related UK CAA AD, which may provide additional background or context but does not change the stated Australian action. (Note)\n\nTrade-offs, risks and implementation notes\n\n- Concentrated versus diffuse effects: The direct costs fall on the relatively small, identifiable group of owners/operators of the specified envelopes; safety/structural benefits are diffuse across users and passengers. (Applicability; Background)\n- Enforcement and discretion: The directive sets a clear compliance path and short time limits; discretion for alternative compliance would depend on regulatory practice or approval, but the instrument itself directs compliance to the manufacturer's service bulletin. (Requirement; Compliance)\n- Substitution effects: Operators may ground affected envelopes until inspection/repair is completed, or choose to retire or replace affected envelopes instead of incurring repair costs; the instrument itself prescribes inspection and repair rather than alternatives. (Compliance; Requirement)\n- Implementation risk: Timely access to the SB-prescribed repair materials or qualified personnel could affect how quickly repairs are completed, though the instrument allows pilots to do the inspection step. (Requirement; The inspection only...)\n\nSource citations\n\n- Applicability: lists affected models and constructor number cutoff.\n- Requirement: directs action in accordance with Cameron Balloons SB No.2 Issue 1 Rev.C.\n- Compliance: specifies inspection within 10 hours TIS and repair within 20 hours TIS after 18 September 1996.\n- The inspection only...: permits pilot-in-command to perform inspection and requires log-book entry/certification.\n- Background: explains the directive's stated objective to ensure adequate reinforcing of turning vents."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific manufacturing defect in specific balloon models. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 4 defined elements: applicability criteria (model, serial number, feature), compliance timeframe, and referenced service bulletin","Single straightforward requirement with clear alternative paths (inspect only vs inspect and repair)","No nested conditional logic or cross-references to other legislation beyond a single note about the UK equivalent directive","Plain language background explanation included"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's aviation regulator (CASA) requiring specific inspections or repairs to aircraft.\n\n**What it does:** Orders owners and operators of certain hot air balloons to inspect the \"turning vents\" (special fabric panels that help steer the balloon) for adequate reinforcement. If the reinforcement is inadequate, repairs must be carried out.\n\n**Who it affects:**\n- **Balloon models:** All \"Thunder,\" \"Colt,\" and \"Thunder and Colt\" envelopes (the fabric part of the balloon) built by Cameron Balloons at their Oswestry factory in the UK\n- **Specific serial numbers:** Only those with constructor numbers below 3550\n- **Specific feature:** Only balloons fitted with turning vents\n\n**What must be done:**\n- **Inspection:** Check the upper and lower ends of the turning vents for proper reinforcement — must be done within 10 hours of flying time after 18 September 1996\n- **Repairs (if needed):** Fix any inadequate reinforcement within 20 hours of flying time after that date\n- **Who can inspect:** The pilot in command (the person flying the balloon) can do the inspection themselves, but must write and sign a record in the official Balloon Log Book\n- **Repairs:** Must presumably be done by qualified maintenance personnel (implied, not explicitly stated)\n\n**Why it matters:** Without proper reinforcement, turning vents could fail structurally — potentially affecting the balloon's ability to steer or creating a safety hazard during flight. This follows a UK safety directive (UK CAA AD 001-07-96), showing international coordination on this manufacturing issue.\n\n**Key compliance document:** Cameron Balloons Service Bulletin No.2, Issue 1, Revision C — this contains the detailed technical instructions for the inspection and repair."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt","history":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt/history","analysis":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt/analysis","conflicts":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt/conflicts","importantCases":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt/important-cases","documents":"/api/acts/ad-bal-17-turning-vents-cameron-balloons-ltd-thunder-and-colt/documents"}}