AD 75-19-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aerostar International | RX-6 | Airworthiness Directives; Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons |
| aircraft | Aerostar International | S-40A | Airworthiness Directives; Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons |
| aircraft | Aerostar International | S-50A | Airworthiness Directives; Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons |
| aircraft | Aerostar International | S-55A | Airworthiness Directives; Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons |
| aircraft | Aerostar International | S-60A | Airworthiness Directives; Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons |
Unsafe Condition
Failures of the 'O' ring on the valve stem; valve seat washer loosening; or valve actuating handle rollpin becoming dislodged.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours time in service, inspect and replace Rego 'O' ring P/N 1421.7 with lubrication, check and retorque valve seat retaining screw with thread locking compound, reinstall actuating lever with rollpin and secure with cotter pin or safety wire, and maintain records per FAR 91.173. Repeat thereafter every 100 hours time in service or 12 calendar months.
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Compliance Time
Within the next 25 hours time in service unless already accomplished within the last 25 hours time in service. Thereafter at each 100 hours time in service or intervals not exceeding 12 calendar months from the last inspection, whichever comes first.
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Affected Aircraft
Raven Model S-40A, S-50A, S-55A, S-60A, and RX-6 Hot Air Balloons with Rego 7553S series blast valves installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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