AD 72-25-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McCauley Propeller Systems | E2A34C | MCCAULEY Models E2A34C64(-)/90AT-8 and E2A34C73(-)/90AT-8 Propellers |
Unsafe Condition
Blade and hub failures due to affected Model 90AT-8 blades with serial numbers not ending with suffix letter 'S' and hubs with serial numbers 64000 thru 699999 for models E2A34C64, E2A34C64-A, E2A34C73, E2A34C73-A, E2A34C73-J, and E2A34C73-K.
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Required Actions
Rework or replace blades and hubs per McCauley Service Bulletin 100 or with non-affected blades/hubs. Replace E2A34C64(-) hubs with E2A34C73(-) models or reworked hubs, including spinner shell and bulkhead replacement using Cessna P/N SK-210-45 kit.
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Compliance Time
Within the next 25 hours in service after December 13, 1972, for propellers with 775+ hours; prior to 800 total hours in service for those with less than 775 hours; unknown hours assumed to be 775+.
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Affected Aircraft
McCauley Propeller Systems Models E2A34C64(-)/90AT-8 and E2A34C73(-)/90AT-8 propellers with blades serial numbers not ending with 'S' and hubs serial numbers 64000-699999 for models E2A34C64, E2A34C64-A, E2A34C73, E2A34C73-A, E2A34C73-J, E2A34C73-K installed on Cessna P206 and 210E-L with Continental IO-520 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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