{"id":"F2006B03558","name":"AD/BAL/2 Amdt 1 - Blast or Burner Valves","slug":"ad-bal-2-amdt-1-blast-or-burner-valves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43125,"registerId":"commonwealth-F2006B03558-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BAL/2 Amdt 1 - Blast or Burner Valves","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/2\n\nAmdt 1\n\n  \nBlast or Burner Valves 7/90\n\nApplicability: All hot air balloons fitted with Rego series blast or burner valves.\n\nRequirement: 1. Remove the valve actuating lever rollpin P/No 7553S-8 from actuating lever. (Be careful to remove any burrs in the stem area around the rollpin hole before removing the valve stem P/No 7553S-1 from the bonnet P/No 7553-5). Replace the O-ring stem seal with a new Rego O-ring P/No 1421-7. Lubricate the new O- ring with a suitable lubricant before reassembly.\n\n    2. For Rego 7553 S valves only. Check the torque of the valve seat retaining screw to 10-12 inch lbs in the loosening direction. If it turns, the screw must be removed, cleaned of lubricant and reinstalled using MIL-S-22473 high strength thread locking compound, such as two ton epoxy by Devcon or Loctite 271 or equivalent. Re-check torque after thread locking compound has cured.\n\nCAUTION: Do not permit the thread locking compound to adhere to the rubber seating surface.\n\n    3. Reinstall valve actuating lever on the valve body with rollpin P/No 7553S-8. Install a number six machine screw and stop nut or a 3/32 inch stainless steel cotter pin or .040 inch diameter safety wire through the hole in the rollpin, holding the actuating handle to the valve body, and secure.\n\nNote: FAA AD 75-12-08 Amdt 39-2587 refers.\n\nCompliance: Unless previously inspected, within 10 hrs time in service after 30 April 1986. Thereafter, reinspect at intervals not exceeding 100 hours or 12 months time in service, whichever occurs first.\n\nBackground: To prevent failures of the O-ring on the valve stem, valve seat washer loosening or valve actuating handle rollpin becoming dislodged. Amendment 1 requires ALL rego valves to be inspected.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the directive to require inspection of ALL Rego‑series valves. The Background explicitly states Amendment 1 requires ALL Rego valves to be inspected, increasing the population of affected balloons and placing the inspection/repair costs and recurring compliance burden on all operators with Rego valves."},"complexity_factors":["Technical mechanical steps (removal/reinstallation of rollpin and valve stem; O‑ring replacement) increase procedural complexity (Requirement 1).","Specific torque requirement (10–12 inch‑lbs loosen‑direction check) requires torque tools and skill (Requirement 2).","Use of thread‑locking compound with cure time and caution to avoid contamination of rubber seating surface adds material‑handling precision (Requirement 2, CAUTION).","Multiple acceptable securing methods for the rollpin (machine screw + stop nut, cotter pin, or safety wire) creates options that must be judged by maintainers (Requirement 3).","Part‑numbered components and lubricant/O‑ring specification require correct spares sourcing and inventory control (multiple P/No references).","Recurring inspection interval (every 100 hours or 12 months) imposes ongoing compliance and record‑keeping burdens (Compliance).","Safety‑critical nature of burner valves raises stakes for correct execution and documentation despite straightforward tasks."],"plain_english_summary":"This Airworthiness Directive requires hot‑air balloon operators with Rego‑series blast/burner valves to inspect and repair those valves: remove and replace the valve‑stem O‑ring, check and secure the valve‑seat retaining screw (using thread‑locking compound if it moves), and ensure the actuating lever rollpin is secured. It targets owners/operators and maintenance personnel and matters because it aims to prevent O‑ring failures, loosening of the seat screw and dislodged rollpins. Compliance is within 10 flight hours and then every 100 hours or 12 months."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical airworthiness directive focused on a specific mechanical component. Amendment 1 expanded the applicability from a subset of Rego valves to ALL Rego valves, but this is a minor expansion within the same safety purpose (preventing valve failures). The scope remains tightly constrained to hot air balloon burner valve maintenance."},"complexity_factors":["Single specific maintenance task with clear step-by-step instructions","Only 3 numbered requirements plus one caution","Minimal defined terms (only part numbers referenced)","No cross-references to other legislation beyond a note about a related FAA directive","Simple compliance timeline (one-time + recurring interval)","Narrow applicability (specific valve manufacturer and model series only)"],"plain_english_summary":"This safety directive requires owners/operators of hot air balloons fitted with Rego blast/burner valves (including model 7553S and related series) to inspect and repair valve components—replace the stem O‑ring with proper lubrication, secure the handle with a safety pin/wire, and check/tighten a specific screw (using thread‑locker if needed). Initial inspection is within 10 flight hours after 30 April 1986, then every 100 flight hours or 12 months. It prevents burner failure that could cause loss of flame control and a crash."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves","history":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves/history","analysis":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves/analysis","conflicts":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves/conflicts","importantCases":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves/important-cases","documents":"/api/acts/ad-bal-2-amdt-1-blast-or-burner-valves/documents"}}