AD 73-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227B | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227C | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227D | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227E | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
Unsafe Condition
Corrosion or cracking of front and rear horizontal stabilizer spar fittings, part numbers 27-213003-11, -12 and 27-213002-11, due to accumulated in-service time of 2500 hours or more.
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Required Actions
Inspect stabilizer spar fittings within 30 days or within the last 11 months using Fairchild Service Bulletins F-27-55-21 and FH-227-55-12 or an approved equivalent procedure. Repeat inspections every 12 calendar months or 2500 hours in service, whichever comes first. Replace corroded or cracked parts before further flight with same part numbers or approved equivalents.
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Compliance Time
Within the next 30 days unless accomplished within the last 11 months
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Affected Aircraft
Fairchild Model F-27 and FH-227 aircraft with front and rear horizontal stabilizer spar fittings part numbers 27-213003-11, -12 and 27-213002-11 that have accumulated 2500 hours or more in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Front and Rear Spar Fittings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-20-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-20-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft Subject: Front and Rear Spar Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/31/1974 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: 73-20-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2057 AD NUMBER: 73-20-01 SUBJECT HEADING: Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft ACTION: SUMMARY: DATES: Effective December 31, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-20-01 FAIRCHILD: Amendment 39-1721 as amended by Amendment 39-2057. Applies to all Fairchild F-27 and FH-227 Type Aircraft Certificated in all categories. Compliance required as indicated: 1. Affects front and rear horizontal stabilizer spar fittings, P/N's 27-213003-11, -12 and 27-213002-11 which have accumulated 2500 hours or more in service. a. Within the next 30 days unless accomplished within the last 11 months, inspect stabilizer spar fittings in accordance with Section 2 of Fairchild Service Bulletins F-27-55-21 and FH-227-55-12, or inspect in accordance with an approved equivalent procedure. b. The inspections specified in "a" above, shall be repeated at intervals not to exceed 12 calendar months or 2500 hours in service from the last inspection, whichever occurs first. 2. Corroded or cracked parts shall be replaced prior to further flight. a. Parts replacement shall be in accordance with Section 2 of Fairchild Service Bulletins F-27-55-21 and FH-227-55-12, and shall be of the same part number or approved equivalent parts. 3. The aircraft may be flown in accordance with FAR 21.197 to a base where the inspections or repairs can be performed. 4. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection interval specified in this AD. Equivalent inspections or parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (Fairchild Service Bulletins F-27-55-21 and FH-227-55-12 pertain to this subject.) Amendment 39-1721 was effective September 24, 1973. This amendment 39-2057 is effective December 31, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_73-20-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-20-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft Subject: Front and Rear Spar Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/31/1974 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: 73-20-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2057 AD NUMBER: 73-20-01 SUBJECT HEADING: Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft ACTION: SUMMARY: DATES: Effective December 31, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-20-01 FAIRCHILD: Amendment 39-1721 as amended by Amendment 39-2057. Applies to all Fairchild F-27 and FH-227 Type Aircraft Certificated in all categories. Compliance required as indicated: 1. Affects front and rear horizontal stabilizer spar fittings, P/N's 27-213003-11, -12 and 27-213002-11 which have accumulated 2500 hours or more in service. a. Within the next 30 days unless accomplished within the last 11 months, inspect stabilizer spar fittings in accordance with Section 2 of Fairchild Service Bulletins F-27-55-21 and FH-227-55-12, or inspect in accordance with an approved equivalent procedure. b. The inspections specified in "a" above, shall be repeated at intervals not to exceed 12 calendar months or 2500 hours in service from the last inspection, whichever occurs first. 2. Corroded or cracked parts shall be replaced prior to further flight. a. Parts replacement shall be in accordance with Section 2 of Fairchild Service Bulletins F-27-55-21 and FH-227-55-12, and shall be of the same part number or approved equivalent parts. 3. The aircraft may be flown in accordance with FAR 21.197 to a base where the inspections or repairs can be performed. 4. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection interval specified in this AD. Equivalent inspections or parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. (Fairchild Service Bulletins F-27-55-21 and FH-227-55-12 pertain to this subject.) Amendment 39-1721 was effective September 24, 1973. This amendment 39-2057 is effective December 31, 1974. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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