AD 46-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing Airplane Company, Wichita Division | 75 (Army PT-13) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75 (Army PT-13A, -13B, -13C) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75J1 (Army PT-18) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75L3 | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | A75N1 (Army PT-17, -17A, Navy N2S-1, -4) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75 (Navy N2S-5) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | B75N1 (Navy N2S-3) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | D75N1 (Army PT-27) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | E75 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) | Airworthiness Directives; BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft |
Unsafe Condition
Water entrapment at the lower rear edge of the wing at the aileron gap due to inadequate drainage, leading to deterioration of rib ends.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Drill 13 No. 30 holes through fabric and dural angle at specified locations forward of the rear spar and near the 120-degree bend, using a stop to limit penetration to 1/2 inch to avoid spar damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next periodic inspection
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Affected Aircraft
BOEING Model A75L3, 75, A75, B75, E75, A75J1, A75N1, B75N1, D75N1 Series Aircraft
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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