AD 67-25-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes |
Unsafe Condition
The Graviner D.1870 or D.1870N/1 loop type overheat detectors and Graviner point type detectors (P/N 4D/3, 13D/3, 68D/3, 150D/07/180) may fail to provide adequate overheat detection, leading to potential fire hazards.
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Required Actions
Replace Graviner D.1870 or D.1870N/1 loop type overheat detectors with Graviner D.5352N/1 coil overheat detectors. Replace existing point type detectors (P/N 4D/3, 13D/3, 68D/3, 150D/07/180) with specified replacements (P/N 134D/3, 135D/3, 136D/3, 150D/07/210). Perform replacements per BAC Modification Bulletins D.3187 Issue 2 (700 Series) or FG.2055 Issue 2 (810 Series), or equivalent approved method.
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Compliance Time
within the next 1,000 hours' time in service after the effective date of this AD
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount Models 744, 745D, and 810 Series airplanes
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Federal Register Abstract
Heat Detectors
Applicability Source Text
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AD Final Rules - DRS_67-25-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-25-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes Subject: Heat Detectors Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/07/1967 Make: Vickers-Armstrongs (Aircraft Limited) Model: Viscount 744 | Viscount 745D | Viscount 810 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-25-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-473 AD NUMBER: 67-25-07 SUBJECT HEADING: Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes ACTION: SUMMARY: DATES: Effective September 7, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-25-07 VICKERS: Amdt. No. 39-473, Part 39, Federal Register September 7, 1967. Applies to Viscount Models 744, 745D and 810 Series Airplanes. Within the next 1,000 hours' time in service after the effective date of this AD, unless already accomplished: Replace Graviner D.1870 or D.1870N/1 loop type overheat detectors with Graviner D.5352N/1 coil overheat detectors. Replace Graviner point type detectors as shown in the following table: Existing P/N Replacement P/N Graviner 4D/3 Graviner 134D/3 Graviner 13D/3 Graviner 135D/3 Graviner 68D/3 Graviner 136D/3 Graviner 150D/07/180 Graviner 150D/07/210 Detectors which are equivalent to the specified Graviner detectors may be used as replacements, subject to the approval of the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. Replace the detectors in accordance with British Aircraft Corporation Limited (BAC) Modification Bulletin No. D.3187, Issue 2, (700 Series), and Modification Bulletin No. FG.2055, Issue 2, (810 Series), or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. This amendment effective September 7, 1967. FOOTER:
Document Text
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AD Final Rules - DRS_67-25-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-25-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes Subject: Heat Detectors Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/07/1967 Make: Vickers-Armstrongs (Aircraft Limited) Model: Viscount 744 | Viscount 745D | Viscount 810 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: 67-25-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-473 AD NUMBER: 67-25-07 SUBJECT HEADING: Airworthiness Directives; VICKERS Models 744, 745D and 810 Series Airplanes ACTION: SUMMARY: DATES: Effective September 7, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-25-07 VICKERS: Amdt. No. 39-473, Part 39, Federal Register September 7, 1967. Applies to Viscount Models 744, 745D and 810 Series Airplanes. Within the next 1,000 hours' time in service after the effective date of this AD, unless already accomplished: Replace Graviner D.1870 or D.1870N/1 loop type overheat detectors with Graviner D.5352N/1 coil overheat detectors. Replace Graviner point type detectors as shown in the following table: Existing P/N Replacement P/N Graviner 4D/3 Graviner 134D/3 Graviner 13D/3 Graviner 135D/3 Graviner 68D/3 Graviner 136D/3 Graviner 150D/07/180 Graviner 150D/07/210 Detectors which are equivalent to the specified Graviner detectors may be used as replacements, subject to the approval of the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. Replace the detectors in accordance with British Aircraft Corporation Limited (BAC) Modification Bulletin No. D.3187, Issue 2, (700 Series), and Modification Bulletin No. FG.2055, Issue 2, (810 Series), or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. This amendment effective September 7, 1967. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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