AD 66-14-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Thrush Aircraft, Inc. | 600-S-2C | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2B | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2C | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2A | Airworthiness 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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install modified wing center splice in accordance with Snow Service Letter No. 29 or an equivalent approved by the FAA. Install wing lower steel spar caps in accordance with Snow Drawing No. 5-1089, Revision D, or an equivalent approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated, unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes with specific serial ranges and engine power ratings as outlined in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Main Spar
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-14-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-14-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes Subject: Wing Main Spar Status: Current Citation: Federal Register: June 3, 1966 Citation Publish Date: 06/03/1966 Effective Date: 07/05/1966 Make: Thrush Aircraft, Inc. Model: 600-S-2C | S-2B | S-2C | S2A Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 66-14-01 CITATION: [Federal Register: June 3, 1966] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-246 AD NUMBER: 66-14-01 SUBJECT HEADING: Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes ACTION: SUMMARY: DATES: Effective July 5, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-14-01 AERO COMMANDER (SNOW): Amdt. 39-246 Part 39 Federal Register June 3, 1966. Applies to Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes. Compliance required as indicated, unless already accomplished. To prevent fatigue cracks in the lower spar cap of the wing main spar, accomplish the following: (a) For Model S-2A airplanes with 1,400 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 1,500 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (b) For Model S-2A airplanes with less than 1,400 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 1,500 hours' time in service and comply with (l) within the next 1,500 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 1,500 hours' time in service. (c) For Models S-2B and S-2C airplanes, Serial Number 1189 and below, powered by 450 hp. engines, with 900 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 1,000 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (d) For Models S-2B and S-2C airplanes, Serial Number 1189 and below, powered by 450 hp. engines, with less than 900 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 1,000 hours' time in service and comply with (l) within the next 1,000 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 1,000 hours' time in service. (e) For Model S-2C airplanes, Serial Numbers 1190 through 1231, powered by 450 hp. engines, with 900 or more hours' time in service on the effective date of this AD, comply with (l) within the next 100 hours' time in service. (f) For Model S-2C airplanes, Serial Numbers 1190 through 1231, powered by 450 hp. engines, with less than 900 hours' time in service on the effective date of this AD, comply with (l) before the accumulation of 1,000 hours' time in service. (g) For Models S-2C and 600 S-2C airplanes, Serial Number 1189 and below, powered by 600 hp. engines, with 600 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 700 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (h) For Models S-2C and 600 S-2C airplanes, Serial Number 1189 and below, powered by 600 hp. engines, with less than 600 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 700 hours' time in service and comply with (l) within the next 700 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 700 hours' time in service. (i) For Models S-2C and 600 S-2C airplanes, Serial Numbers 1190 through 1231, powered by 600 hp. engines, with 600 or more hours' time in service on the effective date of this AD, comply with (l) within the next 100 hours' time in service. (j) For Models S-2C and 600 S-2C airplanes, Serial Numbers 1190 through 1231, powered by 600 hp. engines, with less than 600 hours' time in service on the effective date of this AD, comply with (l) before the accumulation of 700 hours' time in service. (k) Install modified wing center splice in accordance with Snow Service Letter No. 29 or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (l) Install wing lower steel spar caps in accordance with Snow Drawing No. 5-1089, Revision D, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (Snow Service Letter No. 36 pertains to this subject.) This directive effective July 5, 1966. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_66-14-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-14-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes Subject: Wing Main Spar Status: Current Citation: Federal Register: June 3, 1966 Citation Publish Date: 06/03/1966 Effective Date: 07/05/1966 Make: Thrush Aircraft, Inc. Model: 600-S-2C | 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: 66-14-01 CITATION: [Federal Register: June 3, 1966] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-246 AD NUMBER: 66-14-01 SUBJECT HEADING: Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes ACTION: SUMMARY: DATES: Effective July 5, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-14-01 AERO COMMANDER (SNOW): Amdt. 39-246 Part 39 Federal Register June 3, 1966. Applies to Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes. Compliance required as indicated, unless already accomplished. To prevent fatigue cracks in the lower spar cap of the wing main spar, accomplish the following: (a) For Model S-2A airplanes with 1,400 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 1,500 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (b) For Model S-2A airplanes with less than 1,400 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 1,500 hours' time in service and comply with (l) within the next 1,500 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 1,500 hours' time in service. (c) For Models S-2B and S-2C airplanes, Serial Number 1189 and below, powered by 450 hp. engines, with 900 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 1,000 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (d) For Models S-2B and S-2C airplanes, Serial Number 1189 and below, powered by 450 hp. engines, with less than 900 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 1,000 hours' time in service and comply with (l) within the next 1,000 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 1,000 hours' time in service. (e) For Model S-2C airplanes, Serial Numbers 1190 through 1231, powered by 450 hp. engines, with 900 or more hours' time in service on the effective date of this AD, comply with (l) within the next 100 hours' time in service. (f) For Model S-2C airplanes, Serial Numbers 1190 through 1231, powered by 450 hp. engines, with less than 900 hours' time in service on the effective date of this AD, comply with (l) before the accumulation of 1,000 hours' time in service. (g) For Models S-2C and 600 S-2C airplanes, Serial Number 1189 and below, powered by 600 hp. engines, with 600 or more hours' time in service on the effective date of this AD - (1) Comply with (k) within the next 100 hours' time in service and comply with (l) within the next 700 hours' time in service after complying with (k); or (2) Comply with (l) within the next 100 hours' time in service. (h) For Models S-2C and 600 S-2C airplanes, Serial Number 1189 and below, powered by 600 hp. engines, with less than 600 hours' time in service on the effective date of this AD - (1) Comply with (k) before the accumulation of 700 hours' time in service and comply with (l) within the next 700 hours' time in service after complying with (k); or (2) Comply with (l) before the accumulation of 700 hours' time in service. (i) For Models S-2C and 600 S-2C airplanes, Serial Numbers 1190 through 1231, powered by 600 hp. engines, with 600 or more hours' time in service on the effective date of this AD, comply with (l) within the next 100 hours' time in service. (j) For Models S-2C and 600 S-2C airplanes, Serial Numbers 1190 through 1231, powered by 600 hp. engines, with less than 600 hours' time in service on the effective date of this AD, comply with (l) before the accumulation of 700 hours' time in service. (k) Install modified wing center splice in accordance with Snow Service Letter No. 29 or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (l) Install wing lower steel spar caps in accordance with Snow Drawing No. 5-1089, Revision D, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (Snow Service Letter No. 36 pertains to this subject.) This directive effective July 5, 1966. FOOTER:
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