AD 62-21-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model CL-44D4 Aircraft |
Unsafe Condition
Bearing failure resulting from sludge deposited in oil ways which feed the high pressure turbine bearing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install high pressure turbine bearing scavenge oil temperature indicating system per Rolls Royce Modification 959 and Canadair Service Information Circular No. 216-CL44D4. Check oil flow through the scavenge line if not done within 100 hours prior, following Rolls Royce Alert Service Bulletin A-Ty79-15. Update airplane flight manual with provisions from Section 2D of Service Bulletin A-Ty79-15 regarding engine feathering if oil temperature exceeds 180°C during cruise.
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Compliance Time
within the next 350 hours' time in service after the effective date of this AD
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Affected Aircraft
CANADAIR Model CL-44D4 aircraft equipped with Rolls Royce Tyne Engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Oil Temperature Indicating System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_62-21-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-21-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CANADAIR Model CL-44D4 Aircraft Subject: Oil Temperature Indicating System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/29/1962 Make: Bombardier Inc. Model: CL-44D4 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 62-21-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-21-01 SUBJECT HEADING: Airworthiness Directives; CANADAIR Model CL-44D4 Aircraft ACTION: SUMMARY: DATES: Effective October 29, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-21-01 CANADAIR: Amdt. 488 Part 507 Federal Register September 27, 1962. Applies to all Model CL-44D4 aircraft equipped with Rolls Royce Tyne Engines. Compliance required within the next 350 hours' time in service after the effective date of this AD. To preclude bearing failure resulting from sludge deposited in oil ways which feed the high pressure turbine bearing, accomplish the following: (a) Install high pressure turbine bearing scavenge oil temperature indicating system in accordance with Rolls Royce Modification 959 (Service Bulletin Ty72-384) and Canadair Service Information Circular No. 216-CL44D4. (b) If the oil flow through the scavenge line has not been checked within 100 hours prior to the installation of the temperature indicating system specified in (a), check the oil flow in accordance with the procedures outlined in Sections 2A and 2B of Rolls Royce Alert Service Bulletin No. A-Ty79-15 at the time the temperature indicating system is installed. (c) Appropriate changes to the airplane flight manual shall be made covering the applicable provisions of Section 2D of Service Bulletin A-Ty79-15 regarding feathering of an engine if the turbine bearing scavenge oil corrected temperature exceeds 180 degrees C. during cruise. (d) When the oil temperature indicating system is installed per paragraph (a) the inspections required in AD 62-9-2 as amended, may be discontinued. This directive effective October 29, 1962. FOOTER:
Document Text
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AD Final Rules - DRS_62-21-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-21-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CANADAIR Model CL-44D4 Aircraft Subject: Oil Temperature Indicating System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/29/1962 Make: Bombardier Inc. Model: CL-44D4 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: 62-21-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-21-01 SUBJECT HEADING: Airworthiness Directives; CANADAIR Model CL-44D4 Aircraft ACTION: SUMMARY: DATES: Effective October 29, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-21-01 CANADAIR: Amdt. 488 Part 507 Federal Register September 27, 1962. Applies to all Model CL-44D4 aircraft equipped with Rolls Royce Tyne Engines. Compliance required within the next 350 hours' time in service after the effective date of this AD. To preclude bearing failure resulting from sludge deposited in oil ways which feed the high pressure turbine bearing, accomplish the following: (a) Install high pressure turbine bearing scavenge oil temperature indicating system in accordance with Rolls Royce Modification 959 (Service Bulletin Ty72-384) and Canadair Service Information Circular No. 216-CL44D4. (b) If the oil flow through the scavenge line has not been checked within 100 hours prior to the installation of the temperature indicating system specified in (a), check the oil flow in accordance with the procedures outlined in Sections 2A and 2B of Rolls Royce Alert Service Bulletin No. A-Ty79-15 at the time the temperature indicating system is installed. (c) Appropriate changes to the airplane flight manual shall be made covering the applicable provisions of Section 2D of Service Bulletin A-Ty79-15 regarding feathering of an engine if the turbine bearing scavenge oil corrected temperature exceeds 180 degrees C. during cruise. (d) When the oil temperature indicating system is installed per paragraph (a) the inspections required in AD 62-9-2 as amended, may be discontinued. This directive effective October 29, 1962. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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