Commonwealth legislation

AD/BAL/2 Amdt 1 - Blast or Burner Valves

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legislative instrument

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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.

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AD/BAL/2 Amdt 1 - Blast or Burner Valves

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Hot Air Balloons

AD/BAL/2

Amdt 1

Blast or Burner Valves 7/90

Applicability: All hot air balloons fitted with Rego series blast or burner valves.

Requirement: 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.

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.

CAUTION: Do not permit the thread locking compound to adhere to the rubber seating surface.

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.

Note: FAA AD 75-12-08 Amdt 39-2587 refers.

Compliance: 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.

Background: 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.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/BAL/2 Amdt 1 - Blast or Burner Valves