AD 66-30-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227B | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227C | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227D | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227E | Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes |
Unsafe Condition
Cracks in the engine mount support tube assembly (post support) and engine mount support tube bracket (support assembly) could result in engine separation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect tube assemblies and brackets for cracks using a 10-power glass or equivalent. Repair or replace cracked parts with FAA-approved repairs or equivalent parts. Inspections must be conducted at intervals not exceeding specified service hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours in service after the effective date for those with 10,000+ hours, or before 10,050 hours in service for those with less than 10,000 hours. Subsequent inspections at intervals not exceeding 300 hours in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fairchild-Hiller Model F-27 (all variants) and FH-227 Type airplanes with specific part numbers listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Firewall Support Tube Bracket
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-30-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-30-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes Subject: Firewall Support Tube Bracket Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1977 Make: Maryland Air Industries, Inc. Model: F-27 | F-27A | F-27B | F-27F | F-27G | F-27J | F-27M | FH-227 | FH-227B | FH-227C | FH-227D | FH-227E 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: 66-30-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2870 AD NUMBER: 66-30-04 SUBJECT HEADING: Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes ACTION: SUMMARY: DATES: Effective April 13, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-30-04 FAIRCHILD-HILLER: Amendment 39-315 as amended by Amendment 39-493 and 39-711 is further amended by Amendment 39-2870. Applies to F-27 Type and FH-227 Type Airplanes, certificated in all categories. Compliance required as indicated. To detect cracks in the engine mount support tube assembly (post support) and engine mount support tube bracket (support assembly), accomplish the following: (a) For airplanes equipped with upper tube assembly P/N 27-503105-11, -31, -41, -51; P/N 01-503105-11, or -31; upper bracket P/N 27-110105-11, -12, -31, -32, -41, -42, -51, -52, -61, -62, -71, -72, -81, or -82; or lower tube assembly P/N 27-503101-11, -41, -51, -61, -71, -81, -91, -101, or -111: (1) Inspect in accordance with (c) the tube assemblies and brackets having 10,000 or more hours in service on the effective date of this A.D. within the next 50 hours in service after the effective date of this A.D. unless already accomplished within the last 250 hours in service, and thereafter at intervals not to exceed 300 hours in service from the last inspection. (2) Inspect in accordance with (c) the tube assemblies and brackets having less than 10,000 hours in service on the effective date of this A.D. before the accumulation of 10,050 hours in service unless already accomplished after the accumulation of 9750 hours in service, and thereafter at intervals not to exceed 300 hours in service from the last inspection. (b) Airplanes equipped with Fairchild Hiller brackets P/N 01-110105-3, -4, -11, -12, -13, -14, -31 or -32 must be inspected in accordance with (c) at intervals not to exceed 300 hours in service after the accumulation of 25000 hours in service. (c) Without removing the tube assembly or bracket, clean all surfaces of each engine mount support tube bracket (four per airplane located at the wing front spar) and each engine mount support tube assembly (eight per airplane) prior to inspection. Visually inspect for cracks each bracket and support tube assembly using a glass of at least 10 power or an FAA approved equivalent inspection. If cracks are found comply with (d) before further flight. (d) Repair cracked parts in accordance with an FAA approved repair or replace them with a part of the same part number that has been inspected in accordance with (c) or with an FAA approved equivalent part. Equivalent repairs or parts may be installed when approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (e) Upon request with substantiating data submitted through an FAA maintenance inspector, the compliance times specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Fairchild Service Bulletins F27-54-14 and FH227-54-4, Revision 3 dated January 7, 1977, cover this subject. Amendment 39-315 superseded AD 66-07-04. Amendment 39-315 was effective December 10, 1966. Amendment 39-493 was effective on October 21, 1967. Amendment 39-711 was effective January 18, 1969. This amendment 39-2870 is effective April 13, 1977. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_66-30-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-30-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes Subject: Firewall Support Tube Bracket Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1977 Make: Maryland Air Industries, Inc. Model: F-27 | F-27A | F-27B | F-27F | F-27G | F-27J | F-27M | FH-227 | FH-227B | FH-227C | FH-227D | FH-227E 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: 66-30-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2870 AD NUMBER: 66-30-04 SUBJECT HEADING: Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Type Airplanes ACTION: SUMMARY: DATES: Effective April 13, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-30-04 FAIRCHILD-HILLER: Amendment 39-315 as amended by Amendment 39-493 and 39-711 is further amended by Amendment 39-2870. Applies to F-27 Type and FH-227 Type Airplanes, certificated in all categories. Compliance required as indicated. To detect cracks in the engine mount support tube assembly (post support) and engine mount support tube bracket (support assembly), accomplish the following: (a) For airplanes equipped with upper tube assembly P/N 27-503105-11, -31, -41, -51; P/N 01-503105-11, or -31; upper bracket P/N 27-110105-11, -12, -31, -32, -41, -42, -51, -52, -61, -62, -71, -72, -81, or -82; or lower tube assembly P/N 27-503101-11, -41, -51, -61, -71, -81, -91, -101, or -111: (1) Inspect in accordance with (c) the tube assemblies and brackets having 10,000 or more hours in service on the effective date of this A.D. within the next 50 hours in service after the effective date of this A.D. unless already accomplished within the last 250 hours in service, and thereafter at intervals not to exceed 300 hours in service from the last inspection. (2) Inspect in accordance with (c) the tube assemblies and brackets having less than 10,000 hours in service on the effective date of this A.D. before the accumulation of 10,050 hours in service unless already accomplished after the accumulation of 9750 hours in service, and thereafter at intervals not to exceed 300 hours in service from the last inspection. (b) Airplanes equipped with Fairchild Hiller brackets P/N 01-110105-3, -4, -11, -12, -13, -14, -31 or -32 must be inspected in accordance with (c) at intervals not to exceed 300 hours in service after the accumulation of 25000 hours in service. (c) Without removing the tube assembly or bracket, clean all surfaces of each engine mount support tube bracket (four per airplane located at the wing front spar) and each engine mount support tube assembly (eight per airplane) prior to inspection. Visually inspect for cracks each bracket and support tube assembly using a glass of at least 10 power or an FAA approved equivalent inspection. If cracks are found comply with (d) before further flight. (d) Repair cracked parts in accordance with an FAA approved repair or replace them with a part of the same part number that has been inspected in accordance with (c) or with an FAA approved equivalent part. Equivalent repairs or parts may be installed when approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (e) Upon request with substantiating data submitted through an FAA maintenance inspector, the compliance times specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Fairchild Service Bulletins F27-54-14 and FH227-54-4, Revision 3 dated January 7, 1977, cover this subject. Amendment 39-315 superseded AD 66-07-04. Amendment 39-315 was effective December 10, 1966. Amendment 39-493 was effective on October 21, 1967. Amendment 39-711 was effective January 18, 1969. This amendment 39-2870 is effective April 13, 1977. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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