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 |
| aircraft | Boeing Airplane Company, Wichita Division | E75N1 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) | Airworthiness Directives; BOEING Model 75 Series Aircraft |
| aircraft | Boeing Airplane Company, Wichita Division | IB75A | 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.
Federal Register Abstract
Wing Spar Inspection
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_50-06-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-06-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING Model 75 Series Aircraft Subject: Wing Spar Inspection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Boeing Airplane Company, Wichita Division Model: 75 (Army PT-13) | A75 (Army PT-13A, -13B, -13C) | A75J1 (Army PT-18) | A75L3 | A75L300 | A75N1 (Army...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 50-06-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-06-02 SUBJECT HEADING: Airworthiness Directives; BOEING Model 75 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-06-02 BOEING: Applies to All Model 75 Series Aircraft. Compliance required at each annual inspection. For military aircraft, compliance also required prior to original certification. Remove the center section gas tank and inspect both front and rear spars for cracks, checks and warping. Defective spars should be replaced or repaired in accordance with CAM 18. Ascertain that all drain holes are open. Repeated removal of the tank at each annual inspection is not necessary, if after accomplishment of the items mentioned above, the gap between the gas tank and the upper surface of the center section is sealed by doping on grade A fabric tape, or equivalent sealing means, to prevent moisture entering the tank compartment. This supersedes AD 45-51-01. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_50-06-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-06-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING Model 75 Series Aircraft Subject: Wing Spar Inspection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Boeing Airplane Company, Wichita Division Model: 75 (Army PT-13) | A75 (Army PT-13A, -13B, -13C) | A75J1 (Army PT-18) | A75L3 | A75L300 | A75N1 (Army...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 50-06-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-06-02 SUBJECT HEADING: Airworthiness Directives; BOEING Model 75 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-06-02 BOEING: Applies to All Model 75 Series Aircraft. Compliance required at each annual inspection. For military aircraft, compliance also required prior to original certification. Remove the center section gas tank and inspect both front and rear spars for cracks, checks and warping. Defective spars should be replaced or repaired in accordance with CAM 18. Ascertain that all drain holes are open. Repeated removal of the tank at each annual inspection is not necessary, if after accomplishment of the items mentioned above, the gap between the gas tank and the upper surface of the center section is sealed by doping on grade A fabric tape, or equivalent sealing means, to prevent moisture entering the tank compartment. This supersedes AD 45-51-01. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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