AD 93-10-08
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-6-1 | Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-100 | Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-200 | Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-300 | Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
Unsafe Condition
Failure of the overhead control console, which could result in loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the overhead console control quadrants for cracks in accordance with de Havilland SB 6/298, Revision D. Depending on crack severity, replace part number C6-CE-1010 with C6CE1421-27 within specified times or reinspect at intervals not exceeding 100 or 200 hours time-in-service. The modification must be completed within 2,400 hours time-in-service unless earlier accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours time-in-service after the effective date of this AD, unless already accomplished within the last 175 hours time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes (serial numbers 1 through 420).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Controls in Overhead Control Console
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_93-10-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-10-08 Document Type: AD Final Rules Docket Number: 91-CE-49-AD Subject Heading: Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes Subject: Controls in Overhead Control Console Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/16/1993 Make: Viking Air Limited Model: DHC-6-1 | DHC-6-100 | DHC-6-200 | DHC-6-300 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: 93-10-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-CE-49-AD AMENDMENT: 39-8588 AD NUMBER: 93-10-08 SUBJECT HEADING: Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes ACTION: SUMMARY: DATES: Effective July 16, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-10-08 DE HAVILLAND: Amendment 39-8588. Docket No. 91-CE-49-AD. Supersedes AD 73-19-06, Amendments 39-1800 and 39-1710. Applicability: Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes (serial numbers 1 through 420), certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent failure of the overhead control console, which could result in loss of control of the airplane, accomplish the following: (a) Within the next 25 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished within the last 175 hours TIS (compliance with AD 73-19-06), visually inspect the overhead console control quadrants for cracks in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland Service Bulletin (SB) 6/298, Revision D, dated December 20, 1991. (1) If cracks are found that meet or exceed the requirements specified in paragraph 3.1 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, prior to further flight, replace the overhead control console quadrants, part number (P/N) C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298. (2) If cracks are found that meet or exceed the requirements specified in paragraph 3.2 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, within the next 200 hours TIS, replace the overhead control console quadrants, P/N C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298. (3) If cracks are found that are less than that specified in paragraph 3.2 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, reinspect at intervals not to exceed 100 hours TIS until the modification specified in paragraph (b) of this AD is accomplished. (4) If no cracks are found, reinspect at intervals not to exceed 200 hours TIS until the modification specified in paragraph (b) of this AD is accomplished. (b) Within the next 2,400 hours TIS after the effective date of this AD, unless already accomplished as specified in paragraph (a)(1) or (a)(2) of this AD, replace the overhead control console quadrants, P/N C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991. (c) The installation of new overhead control console quadrants (Modification No. 6/1467) as specified in paragraphs (a)(1), (a)(2), and (b) of this AD is considered terminating action for the repetitive inspection requirement of this AD. (d) 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. (e) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, New York Aircraft Certification Office, 181 Franklin Avenue, Room 202, Valley Stream, New York 11581. The request shall be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York Aircraft Certification Office. (f) The inspections and modification required by this AD shall be done in accordance with de Havilland Service Bulletin (SB) 6/298, Revision D, dated December 20, 1991. 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., 123 Garratt Boulevard, Downsview, Ontario, Canada, M3K 1Y5. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. (g) This amendment (39-8588) supersedes AD 73-19-06, Amendments 39-1800 and 39-1710. (h) This amendment becomes effective on July 16, 1993. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_93-10-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-10-08 Document Type: AD Final Rules Docket Number: 91-CE-49-AD Subject Heading: Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes Subject: Controls in Overhead Control Console Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/16/1993 Make: Viking Air Limited Model: DHC-6-1 | DHC-6-100 | DHC-6-200 | DHC-6-300 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: 93-10-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-CE-49-AD AMENDMENT: 39-8588 AD NUMBER: 93-10-08 SUBJECT HEADING: Airworthiness Directives; DE HAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes ACTION: SUMMARY: DATES: Effective July 16, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-10-08 DE HAVILLAND: Amendment 39-8588. Docket No. 91-CE-49-AD. Supersedes AD 73-19-06, Amendments 39-1800 and 39-1710. Applicability: Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes (serial numbers 1 through 420), certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent failure of the overhead control console, which could result in loss of control of the airplane, accomplish the following: (a) Within the next 25 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished within the last 175 hours TIS (compliance with AD 73-19-06), visually inspect the overhead console control quadrants for cracks in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland Service Bulletin (SB) 6/298, Revision D, dated December 20, 1991. (1) If cracks are found that meet or exceed the requirements specified in paragraph 3.1 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, prior to further flight, replace the overhead control console quadrants, part number (P/N) C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298. (2) If cracks are found that meet or exceed the requirements specified in paragraph 3.2 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, within the next 200 hours TIS, replace the overhead control console quadrants, P/N C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298. (3) If cracks are found that are less than that specified in paragraph 3.2 of the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991, reinspect at intervals not to exceed 100 hours TIS until the modification specified in paragraph (b) of this AD is accomplished. (4) If no cracks are found, reinspect at intervals not to exceed 200 hours TIS until the modification specified in paragraph (b) of this AD is accomplished. (b) Within the next 2,400 hours TIS after the effective date of this AD, unless already accomplished as specified in paragraph (a)(1) or (a)(2) of this AD, replace the overhead control console quadrants, P/N C6-CE-1010, with P/N C6CE1421-27 in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of de Havilland SB No. 6/298, Revision D, dated December 20, 1991. (c) The installation of new overhead control console quadrants (Modification No. 6/1467) as specified in paragraphs (a)(1), (a)(2), and (b) of this AD is considered terminating action for the repetitive inspection requirement of this AD. (d) 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. (e) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, New York Aircraft Certification Office, 181 Franklin Avenue, Room 202, Valley Stream, New York 11581. The request shall be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York Aircraft Certification Office. (f) The inspections and modification required by this AD shall be done in accordance with de Havilland Service Bulletin (SB) 6/298, Revision D, dated December 20, 1991. 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., 123 Garratt Boulevard, Downsview, Ontario, Canada, M3K 1Y5. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. (g) This amendment (39-8588) supersedes AD 73-19-06, Amendments 39-1800 and 39-1710. (h) This amendment becomes effective on July 16, 1993. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...
2022-11-12
final ruleAirworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier, Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: binding of the rod end bearing connecting the lower fuel control unit (FCU) push rod assembly to the FCU power lever, which can occur after a period of non-utilization of the aeroplane, and may lea...
2022-11-09
final ruleAirworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: Cracks and corrosion damage to the aileron internal structure, which could lead to progressive looseness of the aileron at the hinge support rib push-pull rod attachment, flutter condition, and deg...
2022-10-07 Recurring
final ruleAirworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier, Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: Damage to the flight control system of DHC-6 aeroplanes was found during inspection. The damage has been attributed to ground gusts. The damage included cracks in the base of the lower control colu...