AD 92-27-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes |
Unsafe Condition
Reduced structural integrity of the engine nacelles due to missing rivets securing the upper longerons in each inner engine nacelle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct an inspection within 6 months after January 22, 1993, to determine if rivets securing the upper longerons in each inner engine nacelle were installed per Service Bulletin 7-54-9. If rivets are missing, accomplish Modification No. 7/1707 before further flight. Operators may seek alternative methods via the FAA if approved.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 6 months after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
De Havilland Model DHC-7 series airplanes with serial numbers 1 through 7, inclusive, and 9, 10, and 11.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine Nacelles
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-27-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-27-03 Document Type: AD Final Rules Docket Number: 92-NM-158-AD Subject Heading: Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes Subject: Engine Nacelles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/22/1993 Make: Viking Air Limited Model: DHC-7-1 | DHC-7-100 | DHC-7-101 | DHC-7-102 | DHC-7-103 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-27-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-NM-158-AD AMENDMENT: 39-8436 AD NUMBER: 92-27-03 SUBJECT HEADING: Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes ACTION: SUMMARY: DATES: Effective January 22, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-27-03 DE HAVILLAND, INC.: Amendment 39-8436. Docket No. 92-NM-158-AD. Applicability: Model DHC-7 series airplanes; serial numbers 1 through 7, inclusive, and 9, 10, and 11; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent reduced structural integrity of the engine nacelles, accomplish the following: (a) Within 6 months after the effective date of this AD, conduct an inspection to determine whether rivets that secure the upper longerons in each inner engine nacelle have been installed, in accordance with de Havilland Service Bulletin 7-54-9, dated February 29, 1980. (1) If any rivets are missing, prior to further flight, accomplish Modification No. 7/1707, in accordance with the service bulletin. (2) If all rivets are detected, no further action is required by this AD. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA, Engine and Propeller Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York ACO. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The inspection and modification shall be done in accordance with de Havilland Service Bulletin 7-54-9, dated February 29, 1980. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from de Havilland, Inc., Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on January 22, 1993. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_92-27-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-27-03 Document Type: AD Final Rules Docket Number: 92-NM-158-AD Subject Heading: Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes Subject: Engine Nacelles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/22/1993 Make: Viking Air Limited Model: DHC-7-1 | DHC-7-100 | DHC-7-101 | DHC-7-102 | DHC-7-103 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: 92-27-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-NM-158-AD AMENDMENT: 39-8436 AD NUMBER: 92-27-03 SUBJECT HEADING: Airworthiness Directives; De Havilland Model DHC-7 Series Airplanes ACTION: SUMMARY: DATES: Effective January 22, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-27-03 DE HAVILLAND, INC.: Amendment 39-8436. Docket No. 92-NM-158-AD. Applicability: Model DHC-7 series airplanes; serial numbers 1 through 7, inclusive, and 9, 10, and 11; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent reduced structural integrity of the engine nacelles, accomplish the following: (a) Within 6 months after the effective date of this AD, conduct an inspection to determine whether rivets that secure the upper longerons in each inner engine nacelle have been installed, in accordance with de Havilland Service Bulletin 7-54-9, dated February 29, 1980. (1) If any rivets are missing, prior to further flight, accomplish Modification No. 7/1707, in accordance with the service bulletin. (2) If all rivets are detected, no further action is required by this AD. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA, Engine and Propeller Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York ACO. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The inspection and modification shall be done in accordance with de Havilland Service Bulletin 7-54-9, dated February 29, 1980. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from de Havilland, Inc., Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on January 22, 1993. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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