AD 63-13-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing Airplane Company, Wichita Division | 75 (Army PT-13) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75 (Army PT-13A, -13B, -13C) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75J1 (Army PT-18) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75L3 | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75L300 | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75N1 (Army PT-17, -17A, Navy N2S-1, -4) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75 (Navy N2S-5) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75N1 (Navy N2S-3) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | D75N1 (Army PT-27) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | E75 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) | Airworthiness Directives; BOEING All Model 75 Series Aircraft |
Unsafe Condition
Propeller blade failures due to cracks within the hub area and at least 6 inches of the shank portion outside the hub.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove propeller blades from hub, clean surface as necessary, and inspect by dye penetrant or equivalent method for cracks. Blades with cracks cannot be reused in certificated aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours' time in service after the effective date of this AD, unless already accomplished within the last 225 hours' time in service, and thereafter at intervals not to exceed 250 hours' time in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing All Model 75 Series Aircraft equipped with Pratt & Whitney R-985 or Wright R-975 Series engines and Western Propeller Repair Model W2-1 propellers, including those certificated in the Restricted Category.
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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