AD 49-23-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing Airplane Company, Wichita Division | 75 (Army PT-13) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | A75 (Army PT-13A, -13B, -13C) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | A75J1 (Army PT-18) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | A75L3 | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | A75L300 | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | A75N1 (Army PT-17, -17A, Navy N2S-1, -4) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | B75 (Navy N2S-5) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | B75N1 (Navy N2S-3) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | D75N1 (Army PT-27) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
| aircraft | Boeing Airplane Company, Wichita Division | E75 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) | Airworthiness Directives; BOEING Model 75 Series Airplanes |
Unsafe Condition
Altered fuselage bottom truss installations for crop dusting or seeding hoppers may lack equivalent structural strength, leading to potential failure of the truss members.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect fuselage bottom truss for alterations related to hopper installations. Ensure equivalent structural strength is provided for any removed or revised truss members. Verify open bays in the truss meet specified dimensions and gusset requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to next periodic inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 75 Series airplanes with crop dusting or seeding hopper installations
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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