AD 67-28-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-6-1 | Airworthiness Directives; de Havilland Type DHC-6 Aircraft |
| aircraft | Viking Air Limited | DHC-6-100 | Airworthiness Directives; de Havilland Type DHC-6 Aircraft |
| aircraft | Viking Air Limited | DHC-6-200 | Airworthiness Directives; de Havilland Type DHC-6 Aircraft |
| aircraft | Viking Air Limited | DHC-6-300 | Airworthiness Directives; de Havilland Type DHC-6 Aircraft |
Unsafe Condition
Loss of the horizontal stabilizer due to loose 5/16 inch diameter bolts (P/N NAS 625-36 and NAS 625-53) attaching the horizontal tailplane to the aft fuselage.
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Required Actions
Check torque of four horizontal tailplane to aft fuselage bolts (P/N NAS 625-36 and NAS 625-53) to 225-250 inch-pounds within 15 hours' time in service after AD effective date. Retorque loose bolts to specified torque and recheck every 7 hours' time in service until approved modification is installed.
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Compliance Time
Within the next 15 hours' time in service after the effective date of this AD
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Affected Aircraft
de Havilland Type DHC-6 Aircraft (models DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300)
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Federal Register Abstract
Horizontal Stabilizer
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_67-28-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-28-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Type DHC-6 Aircraft Subject: Horizontal Stabilizer Status: Current Citation: Federal Register: October 21, 1967 Citation Publish Date: 10/21/1967 Effective Date: 10/21/1967 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Model: DHC-6-1 | DHC-6-100 | DHC-6-200 | DHC-6-300 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-28-03 CITATION: [Federal Register: October 21, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-494 AD NUMBER: 67-28-03 SUBJECT HEADING: Airworthiness Directives; de Havilland Type DHC-6 Aircraft ACTION: SUMMARY: DATES: Effective October 21, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-28-03 de HAVILLAND: Amdt. 39-494, Part 39, Federal Register October 21, 1967. Applies to Type DHC-6 Aircraft. Compliance required as indicated. To preclude loss of the horizontal stabilizer, accomplish the following: (a) Within the next 15 hours' time in service after the effective date of this AD, unless already accomplished, check that each of the four horizontal tailplane to aft fuselage 5/16 inch diameter bolts, P/N's NAS 625-36 and NAS 625-53, are torqued to a value of 225 to 250 inch-pounds. If correct, no further action is necessary. If loose, comply with (b). (b) Re-torque loose bolts to a value of 225 to 250 inch-pounds and recheck every 7 hours' time in service to assure that this value is maintained. (c) The check required by (b) may be discontinued when a modification, approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region is incorporated. (d) 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. This amendment effective October 21, 1967. FOOTER:
Document Text
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AD Final Rules - DRS_67-28-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-28-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Type DHC-6 Aircraft Subject: Horizontal Stabilizer Status: Current Citation: Federal Register: October 21, 1967 Citation Publish Date: 10/21/1967 Effective Date: 10/21/1967 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: 67-28-03 CITATION: [Federal Register: October 21, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-494 AD NUMBER: 67-28-03 SUBJECT HEADING: Airworthiness Directives; de Havilland Type DHC-6 Aircraft ACTION: SUMMARY: DATES: Effective October 21, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-28-03 de HAVILLAND: Amdt. 39-494, Part 39, Federal Register October 21, 1967. Applies to Type DHC-6 Aircraft. Compliance required as indicated. To preclude loss of the horizontal stabilizer, accomplish the following: (a) Within the next 15 hours' time in service after the effective date of this AD, unless already accomplished, check that each of the four horizontal tailplane to aft fuselage 5/16 inch diameter bolts, P/N's NAS 625-36 and NAS 625-53, are torqued to a value of 225 to 250 inch-pounds. If correct, no further action is necessary. If loose, comply with (b). (b) Re-torque loose bolts to a value of 225 to 250 inch-pounds and recheck every 7 hours' time in service to assure that this value is maintained. (c) The check required by (b) may be discontinued when a modification, approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region is incorporated. (d) 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. This amendment effective October 21, 1967. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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