AD 60-26-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Brantly International, Inc. | B-2 | Airworthiness Directives; Brantly Model B-2 Helicopters |
| aircraft | Brantly International, Inc. | B-2A | Airworthiness Directives; Brantly Model B-2 Helicopters |
| aircraft | Brantly International, Inc. | B-2B | Airworthiness Directives; Brantly Model B-2 Helicopters |
Unsafe Condition
Misalignment of the tail rotor drive shaft installation and insufficient flexibility in the drive shaft coupling system could result in coupling failure and loss of tail rotor drive.
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Required Actions
Remove the B2-108-34 drive shaft extension and B2-108-35 coupling, realign the drive shaft using jig No. AT-108-31 per Service Bulletin No. 4, install an additional flexible coupling with parts B2-108-45 and B2-14-14 using jig No. MT-339-16, and ensure proper orientation of the couplings as per Modification Step No. 15.
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Compliance Time
within 25 hours' time in service after the effective date of this directive
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Affected Aircraft
All Brantly Model B-2 Helicopters prior to serial No. 44 not previously modified per Brantly Service Bulletin No. 4
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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