AD 76-19-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
Unsafe Condition
Failure of the elevator spring servo tab control mechanism
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the spigot bracket, P/N 70120-367, attaching the elevator spring tab system bellcrank to the left elevator torque tube. Compliance timelines depend on prior compliance with AD 71-4-2 and bracket usage hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours time in service after the effective date or prior to 12,000 hours total time in service on the bracket, whichever is later (if not compliant with AD 71-4-2). For those compliant with AD 71-4-2, within the next 50 hours, 1,000 hours after AD 71-4-2 compliance, or prior to 12,000 hours, whichever is latest. Subsequent replacements must occur before 12,000 hours total time on the bracket.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount Model 744, 745D, and 810 Series airplanes, certificated in all categories.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Elevator Control Mechanism
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes Subject: Elevator Control Mechanism Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/15/1976 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: 76-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2723 AD NUMBER: 76-19-01 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes ACTION: SUMMARY: DATES: Effective October 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-19-01 BRITISH AIRCRAFT CORPORATION: Amendment 39-2723. Applies to Viscount Model 744, 745D, and 810 Series airplanes, certificated in all categories. Compliance is required as indicated. To prevent possible failure of the elevator spring servo tab control mechanism, accomplish the following: (a) Replace the spigot bracket, P/N 70120-367, that attaches the elevator spring tab system bellcrank to the left elevator torque tube with a new bracket of the same part number as follows: (1) If neither paragraph (b) or (c) of AD 71-4-2 has been complied with prior to the effective date of this AD, replace the bracket within the next 100 hours time in service after the effective date of this AD or prior to the accumulation of 12,000 hours total time in service on the bracket, whichever occurs later. (2) If paragraph (b) or (c) of AD 71-4-2 has been complied with prior to the effective date of this AD, replace the bracket at the latest of the following: (i) Within the next 50 hours time in service after the effective date of this AD. (ii) Within 1000 hours time in service after complying with AD 71-4-2 if the bracket was not replaced in complying with that AD. (iii) Prior to the accumulation of 12,000 hours total time in service on the bracket. (3) After complying with paragraph (a)(1) or (a)(2) of this AD, as appropriate, continue to replace the brackets prior to the accumulation of 12,000 hours total time in service after installation. (b) Operators who have not kept records of total hours time in service on individual spigot brackets, P/N 70120-367, must substitute in lieu thereof the total hours time in service of the airplane. This supersedes Amendment 39-1154 (36 FR 2562), AD 71-4-2. This amendment becomes effective October 15, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes Subject: Elevator Control Mechanism Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/15/1976 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: 76-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2723 AD NUMBER: 76-19-01 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes ACTION: SUMMARY: DATES: Effective October 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-19-01 BRITISH AIRCRAFT CORPORATION: Amendment 39-2723. Applies to Viscount Model 744, 745D, and 810 Series airplanes, certificated in all categories. Compliance is required as indicated. To prevent possible failure of the elevator spring servo tab control mechanism, accomplish the following: (a) Replace the spigot bracket, P/N 70120-367, that attaches the elevator spring tab system bellcrank to the left elevator torque tube with a new bracket of the same part number as follows: (1) If neither paragraph (b) or (c) of AD 71-4-2 has been complied with prior to the effective date of this AD, replace the bracket within the next 100 hours time in service after the effective date of this AD or prior to the accumulation of 12,000 hours total time in service on the bracket, whichever occurs later. (2) If paragraph (b) or (c) of AD 71-4-2 has been complied with prior to the effective date of this AD, replace the bracket at the latest of the following: (i) Within the next 50 hours time in service after the effective date of this AD. (ii) Within 1000 hours time in service after complying with AD 71-4-2 if the bracket was not replaced in complying with that AD. (iii) Prior to the accumulation of 12,000 hours total time in service on the bracket. (3) After complying with paragraph (a)(1) or (a)(2) of this AD, as appropriate, continue to replace the brackets prior to the accumulation of 12,000 hours total time in service after installation. (b) Operators who have not kept records of total hours time in service on individual spigot brackets, P/N 70120-367, must substitute in lieu thereof the total hours time in service of the airplane. This supersedes Amendment 39-1154 (36 FR 2562), AD 71-4-2. This amendment becomes effective October 15, 1976. FOOTER:
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Retrieved: Apr 8, 2026
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