AD 91-06-05
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes |
| aircraft | Bombardier Inc. | CL-44J | Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes |
Unsafe Condition
Cracks in significant structural items as defined in Canadair Document RBD-44-100 could compromise the structural integrity of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the FAA-approved maintenance inspection program to include supplemental inspections, replacements, and overhauls per Canadair Document RBD-44-100, Revision B. Report detected cracks to Canadair. Repair or replace cracked structure before further flight as per the same document.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within six months after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Canadair, Ltd. Model CL-44D4 and CL-44J series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Supplemental Inspection Program
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_91-06-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-06-05 Document Type: AD Final Rules Docket Number: 90-NM-186-AD Subject Heading: Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes Subject: Supplemental Inspection Program Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/08/1991 Make: Bombardier Inc. Model: CL-44D4 | CL-44J Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 91-06-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-186-AD AMENDMENT: 39-6852 AD NUMBER: 91-06-05 SUBJECT HEADING: Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes ACTION: SUMMARY: DATES: Effective on April 8, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-06-05 CANADAIR, LTD.: Amendment 39-6852. Docket No. 90-NM-186-AD. Applicability: All Model CL-44D4 and CL-44J series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To ensure the continuing structural integrity of these airplanes, accomplish the following: A. Within six months after the effective date of this AD, incorporate a revision into the FAA-approved maintenance inspection program that provides for supplemental maintenance, inspections, replacement, and overhaul requirements of the significant structural items defined in Canadair Document RBD-44-100, "Supplemental Structural Inspection Program," Revision B, dated February 27, 1990. Inspection results, when a crack is detected, must be reported to Canadair. B. Cracked structure detected during the inspection required by paragraph A. of this AD must be repaired or replaced prior to further flight, in accordance with instructions in Canadair Document RBD-44-100, "Supplemental Structural Inspection Program," Revision B, dated February 27, 1990. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA, New England Region. NOTE: The request should be submitted directly to the Manager, New York Aircraft Certification Office, ANE-170, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, New York ACO. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service document from the manufacturer may obtain copies upon request to Canadair, Ltd., P.O. Box 6087, Station A, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, Northwest Mountain Region, 1601 Lind Avenue S.W., Renton, Washington; or at the FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York. This amendment (39-6852, AD 91-06-05) becomes effective on April 8, 1991. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_91-06-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-06-05 Document Type: AD Final Rules Docket Number: 90-NM-186-AD Subject Heading: Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes Subject: Supplemental Inspection Program Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/08/1991 Make: Bombardier Inc. Model: CL-44D4 | CL-44J 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: 91-06-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-186-AD AMENDMENT: 39-6852 AD NUMBER: 91-06-05 SUBJECT HEADING: Airworthiness Directives; Canadair, Ltd.; Model CL-44D4 and CL-44J Series Airplanes ACTION: SUMMARY: DATES: Effective on April 8, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-06-05 CANADAIR, LTD.: Amendment 39-6852. Docket No. 90-NM-186-AD. Applicability: All Model CL-44D4 and CL-44J series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To ensure the continuing structural integrity of these airplanes, accomplish the following: A. Within six months after the effective date of this AD, incorporate a revision into the FAA-approved maintenance inspection program that provides for supplemental maintenance, inspections, replacement, and overhaul requirements of the significant structural items defined in Canadair Document RBD-44-100, "Supplemental Structural Inspection Program," Revision B, dated February 27, 1990. Inspection results, when a crack is detected, must be reported to Canadair. B. Cracked structure detected during the inspection required by paragraph A. of this AD must be repaired or replaced prior to further flight, in accordance with instructions in Canadair Document RBD-44-100, "Supplemental Structural Inspection Program," Revision B, dated February 27, 1990. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA, New England Region. NOTE: The request should be submitted directly to the Manager, New York Aircraft Certification Office, ANE-170, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, New York ACO. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service document from the manufacturer may obtain copies upon request to Canadair, Ltd., P.O. Box 6087, Station A, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, Northwest Mountain Region, 1601 Lind Avenue S.W., Renton, Washington; or at the FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York. This amendment (39-6852, AD 91-06-05) becomes effective on April 8, 1991. 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.