AD 63-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Thrush Aircraft, Inc. | S-2B | Airworthiness Directives; Snow Model S-2 Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2C | Airworthiness Directives; Snow Model S-2 Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2A | Airworthiness Directives; Snow Model S-2 Airplanes |
Unsafe Condition
Cracks in the wing main spar upper and lower spar web flange in the vicinity of the wing-fuselage attach points (approximately wing Station 19).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the wing main spar upper and lower spar web flange for cracks using at least a 10-power glass within 10 hours' time in service after the effective date. If cracks are found, repair prior to further flight per Snow Service Letter No. 23 or FAA-approved equivalent. If no cracks, repeat inspection every 25 hours' time in service until modification per Snow Service Letter No. 23 or FAA-approved equivalent is incorporated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 10 hours' time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Snow Model S-2 Airplanes, serial numbers 1003 through 1162
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Main Spar Web Flange
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_63-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 63-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Snow Model S-2 Airplanes Subject: Wing Main Spar Web Flange Status: Current Citation: Federal Register: March 2, 1963 Citation Publish Date: 03/02/1963 Effective Date: 03/08/1963 Make: Thrush Aircraft, Inc. Model: S-2B | S-2C | S2A Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 63-05-03 CITATION: [Federal Register: March 2, 1963] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 63-05-03 SUBJECT HEADING: Airworthiness Directives; Snow Model S-2 Airplanes ACTION: SUMMARY: DATES: Effective March 8, 1963. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 63-05-03 SNOW: Amdt. 541 Part 507 Federal Register March 2, 1963. Applies to Model S-2 Aircraft Serial Numbers 1003 Through 1162. Compliance required as indicated. (a) Within 10 hours' time in service after the effective date of this AD, inspect the wing main spar upper and lower spar web flange for cracks in the vicinity of the wing-fuselage attach points (approximately wing Station 19), using at least a 10-power glass. (b) If cracks are found, repair prior to further flight in accordance with Snow Service Letter No. 23 or FAA Engineering and Manufacturing Branch approved equivalent. (c) If no cracks are found, repeat the inspection specified in (a) at intervals not to exceed 25 hours' time in service from the previous inspection. (d) The repetitive inspection required by (c) may be discontinued when the modification set forth in Snow Service Letter No. 23 or an FAA Engineering and Manufacturing Branch approved equivalent is incorporated. This directive effective March 8, 1963. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_63-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 63-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Snow Model S-2 Airplanes Subject: Wing Main Spar Web Flange Status: Current Citation: Federal Register: March 2, 1963 Citation Publish Date: 03/02/1963 Effective Date: 03/08/1963 Make: Thrush Aircraft, Inc. Model: S-2B | S-2C | S2A 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: 63-05-03 CITATION: [Federal Register: March 2, 1963] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 63-05-03 SUBJECT HEADING: Airworthiness Directives; Snow Model S-2 Airplanes ACTION: SUMMARY: DATES: Effective March 8, 1963. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 63-05-03 SNOW: Amdt. 541 Part 507 Federal Register March 2, 1963. Applies to Model S-2 Aircraft Serial Numbers 1003 Through 1162. Compliance required as indicated. (a) Within 10 hours' time in service after the effective date of this AD, inspect the wing main spar upper and lower spar web flange for cracks in the vicinity of the wing-fuselage attach points (approximately wing Station 19), using at least a 10-power glass. (b) If cracks are found, repair prior to further flight in accordance with Snow Service Letter No. 23 or FAA Engineering and Manufacturing Branch approved equivalent. (c) If no cracks are found, repeat the inspection specified in (a) at intervals not to exceed 25 hours' time in service from the previous inspection. (d) The repetitive inspection required by (c) may be discontinued when the modification set forth in Snow Service Letter No. 23 or an FAA Engineering and Manufacturing Branch approved equivalent is incorporated. This directive effective March 8, 1963. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
66-14-01
final ruleAirworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes
Unsafe Condition: Fatigue cracks in the lower spar cap of the wing main spar.