AD 66-16-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes |
Unsafe Condition
Failure of the flap asymmetry switch to continuously detect an asymmetric condition as the asymmetry increases above the 3 degree setting.
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Required Actions
Rewire asymmetry system in accordance with Fairchild-Hiller Service Bulletin No. 27-43, dated December 23, 1965, or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 300 hours' time in service after the effective date of this AD unless already accomplished
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Affected Aircraft
Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes, Serial Numbers 1 through 122, equipped with Center Hinge Wing Flap Asymmetry Switches, P/N 658-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Flap Asymmetry Switches
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-16-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-16-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes Subject: Flap Asymmetry Switches Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/30/1966 Make: Maryland Air Industries, Inc. Model: F-27 | F-27A | F-27B | F-27F | F-27G | F-27J Product Type: Aircraft Product Subtype: Large 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: 66-16-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-252 AD NUMBER: 66-16-04 SUBJECT HEADING: Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes ACTION: SUMMARY: DATES: Effective July 30, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-16-04 FAIRCHILD: Amdt. 39-252 Part 39 Federal Register June 30, 1966. Applies to Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes, Serial Numbers 1 through 122, Equipped with Center Hinge Wing Flap Asymmetry Switches, P/N 658-001. Compliance required within the next 300 hours' time in service after the effective date of this AD unless already accomplished. To prevent failure of the flap asymmetry switch to continuously detect an asymmetric condition as the asymmetry increases above the 3 degree setting, accomplish the following: (a) Rewire asymmetry system in accordance with Fairchild-Hiller Service Bulletin No. 27-43, dated December 23, 1965, or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (b) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, may adjust the compliance time specified in this AD if the request contains substantiating data to justify the increase for that operator. This directive effective July 30, 1966. FOOTER:
Document Text
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AD Final Rules - DRS_66-16-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-16-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes Subject: Flap Asymmetry Switches Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/30/1966 Make: Maryland Air Industries, Inc. Model: F-27 | F-27A | F-27B | F-27F | F-27G | F-27J Product Type: Aircraft Product Subtype: Large 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: 66-16-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-252 AD NUMBER: 66-16-04 SUBJECT HEADING: Airworthiness Directives; Fairchild Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes ACTION: SUMMARY: DATES: Effective July 30, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-16-04 FAIRCHILD: Amdt. 39-252 Part 39 Federal Register June 30, 1966. Applies to Models F-27, F-27A, F-27B, F-27F, F-27G, and F-27J Airplanes, Serial Numbers 1 through 122, Equipped with Center Hinge Wing Flap Asymmetry Switches, P/N 658-001. Compliance required within the next 300 hours' time in service after the effective date of this AD unless already accomplished. To prevent failure of the flap asymmetry switch to continuously detect an asymmetric condition as the asymmetry increases above the 3 degree setting, accomplish the following: (a) Rewire asymmetry system in accordance with Fairchild-Hiller Service Bulletin No. 27-43, dated December 23, 1965, or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (b) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, may adjust the compliance time specified in this AD if the request contains substantiating data to justify the increase for that operator. This directive effective July 30, 1966. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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