AD 61-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Brantly International, Inc. | B-2 | Airworthiness Directives; All BRANTLY Model B-2 Helicopters |
| aircraft | Brantly International, Inc. | B-2A | Airworthiness Directives; All BRANTLY Model B-2 Helicopters |
| aircraft | Brantly International, Inc. | B-2B | Airworthiness Directives; All BRANTLY Model B-2 Helicopters |
Unsafe Condition
Severe oil leaks from failure of the welded seam of the mixture heater oil jacket (Lycoming P/N 72396) on Lycoming VO-360 engines introduce a fire hazard and engine failure risk from oil starvation.
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Required Actions
Disconnect oil system hose assemblies from mixture heater oil jacket ports, bypass with AN 815-8D union, support with AN 742-D-14C clamps, remove and recondition oil jacket with zinc chromate and capped ports. Modify engine cooling boxes per Brantly SB No. 12 including covers, baffles, cutouts, and thermocouple relocation.
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Compliance Time
within the next 25 hours' time in service after effective date of this directive
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Affected Aircraft
All BRANTLY Model B-2 Helicopters Prior to Serial No. 95
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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