AD 50-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing Airplane Company, Wichita Division | 75 (Army PT-13) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75 (Army PT-13A, -13B, -13C) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75J1 (Army PT-18) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75L3 | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75L300 | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75N1 (Army PT-17, -17A, Navy N2S-1, -4) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75 (Navy N2S-5) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75N1 (Navy N2S-3) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | D75N1 (Army PT-27) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | E75 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
Unsafe Condition
Cracks, checks, and warping in the wing spar front and rear spars due to moisture ingress into the tank compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the center section gas tank and inspect both front and rear spars for cracks, checks, and warping. Replace or repair defective spars in accordance with CAM 18. Seal the gap between the gas tank and the upper surface of the center section with doping on grade A fabric tape or equivalent to prevent moisture entry.
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Compliance Time
at each annual inspection. For military aircraft, compliance also required prior to original certification.
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Affected Aircraft
Boeing Airplane Company, Wichita Division Model 75 Series Aircraft, including 75, A75, A75J1, A75L3, A75L300, A75N1, and other listed models.
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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