AD 97-04-17
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ100A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ70A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ85A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
Unsafe Condition
Leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG) due to a manufacturing forging defect that extends through the wall of the lock jack assembly. This leakage, in conjunction with a hot brake, could cause a fire in the MLG bay.
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Required Actions
Within 30 days after the effective date, verify the serial numbers of all MLG lock jack assemblies. If any assembly has a serial number listed in SB 32-103, inspect for hydraulic fluid leakage before further flight. Repeat inspections every 30 days until replacements are done. Within 6 months, replace affected lock jack assemblies with new or serviceable units. Prohibit installation of affected assemblies after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD, and within 6 months after the effective date for replacements. Compliance is required prior to further flight for inspections detecting leakage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
British Aerospace Models BAe 146 series and Avro 146-RJ series airplanes with lock jack assemblies listed in SB 32-103, Revision 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
MLG Lock Jack Assemblies
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_97-04-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 97-04-17 Document Type: AD Final Rules Docket Number: 96-NM-48-AD Subject Heading: Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes Subject: MLG Lock Jack Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/31/1997 Make: BAE Systems (Operations) Limited Model: Avro 146-RJ100A | Avro 146-RJ70A | Avro 146-RJ85A | BAe 146-100A | BAe 146-200A | BAe 146-300A 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 [62 FR 8157 NO. 36 02/24/97] Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 97-04-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 96-NM-48-AD AMENDMENT: 39-9942 AD NUMBER: 97-04-17 SUBJECT HEADING: Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes ACTION: Final rule SUMMARY: This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes, that requires inspections to detect leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG), and eventual replacement of those assemblies with new or serviceable assemblies. This amendment is prompted by reports of leakage of hydraulic fluid from lock jack assemblies due to a manufacturing forging defect that extends through the wall of the lock jack assembly. The actions specified by this AD are intended to prevent leakage of hydraulic fluid from the lock jack assemblies of the MLG, which, in conjunction with a hot brake, could cause a fire in the MLG bay. DATES: Effective March 31, 1997. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of March 31, 1997. ADDRESSES: The service information referenced in this AD may be obtained from British Aerospace Holding, Inc., Avro International Aerospace Division, P.O. Box 16039, Dulles International Airport, Washington, DC 20041-6039. This information may be examined at the Federal Aviation Administration (FAA), Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. FOR FURTHER INFORMATION CONTACT: Tim Backman, Aerospace Engineer, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (206) 227-2797; fax (206) 227-1149. SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain British Aerospace Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes was published in the Federal Register on August 27, 1996 (61 FR 44006). That action proposed to require an inspection to identify affected lock jack assemblies by serial number. That action also proposed to require repetitive inspections of certain lock jack assemblies to detect leakage of hydraulic fluid from the lock jack assemblies, and, if leakage is detected, replacement of the lock jack assemblies with new or serviceable assemblies. That action also proposed to require eventual replacement of the lock jack assemblies with new or serviceable assemblies. Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were submitted in response to the proposal or the FAA's determination of the cost to the public. Conclusion The FAA has determined that air safety and the public interest require the adoption of the rule as proposed. Cost Impact The FAA estimates that 52 airplanes of U.S. registry will be affected by this AD. To accomplish the required inspections will take approximately 1 work hour per airplane, per inspection, at an average labor rate of $60 per work hour. Based on these figures, the cost impact of the required inspections on U.S. operators is estimated to be $3,120, or $60 per airplane, per inspection cycle. To accomplish the required replacement of the lock jack assembly will take approximately 1 work hour per airplane, at an average labor rate of $60 per work hour. Required parts will be provided by the manufacturer at no cost to the operators. Based on these figures, the cost impact of the required replacement on U.S. operators is estimated to be $3,120, or $60 per airplane. The cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. Regulatory Impact The regulations adopted herein will not have substantial direct effects on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. For the reasons discussed above, I certify that this action (1) is not a "significant regulatory action" under Executive Order 12866; (2) is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption "ADDRESSES." List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39 - AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 - [Amended] 2. Section 39.13 is amended by adding the following new airworthiness directive: REGULATORY TEXT: 97-04-17 BRITISH AEROSPACE REGIONAL AIRCRAFT LIMITED, AVRO INTERNATIONAL AEROSPACE DIVISION (formerly British Aerospace, plc; British Aerospace Commercial Aircraft Limited): Amendment 39-9942. Docket 96-NM-48-AD. Applicability: Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes having lock jack assemblies of the main landing gear as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991; certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG), which, in conjunction with a hot brake, could cause a fire in the MLG bay; accomplish the following: (a) Within 30 days after the effective date of this AD, verify the serial number of all lock jack assemblies, part number 104275001, of the MLG. NOTE 2: Verification may be accomplished by a review of appropriate records. (1) If no lock jack assembly has a serial number as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, no further action is required by this paragraph. (2) If any lock jack assembly has a serial number as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, prior to further flight, perform a visual inspection to detect any leakage of hydraulic fluid from the lock jack assembly, in accordance with the service bulletin. (i) If no leakage of hydraulic fluid is detected, thereafter, repeat the inspection at intervals not to exceed 30 days, until the requirements of paragraph (b) of this AD are accomplished. (ii) If any leakage of hydraulic fluid is detected, prior to further flight, replace the lock jack assembly with a new or serviceable unit that does not have one of those serial numbers, in accordance with the service bulletin. (b) Within 6 months after the effective date of this AD, replace any lock jack assembly having a serial number listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, with a new or serviceable assembly that does not have one of those serial numbers, in accordance with the service bulletin. (c) As of the effective date of this AD, no person shall install a lock jack assembly, having any serial number listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, on any airplane. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113. NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (e) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (f) The inspections and replacements shall be done in accordance with British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, which contains the specified list of effective pages: Page Number Revision Level Shown on Page Date Shown on Page 1, 2, Appendix A1 Page 1-3 1 February 22, 1991 3, Appendix A1 Page 4 Original June 15, 1990 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from British Aerospace Holding, Inc., Avro International Aerospace Division, P.O. Box 16039, Dulles International Airport, Washington, DC 20041-6039. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (g) This amendment becomes effective on March 31, 1997. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_97-04-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 97-04-17 Document Type: AD Final Rules Docket Number: 96-NM-48-AD Subject Heading: Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes Subject: MLG Lock Jack Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/31/1997 Make: BAE Systems (Operations) Limited Model: Avro 146-RJ100A | Avro 146-RJ70A | Avro 146-RJ85A | BAe 146-100A | BAe 146-200A | BAe 146-300A 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 [62 FR 8157 NO. 36 02/24/97] Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 97-04-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 96-NM-48-AD AMENDMENT: 39-9942 AD NUMBER: 97-04-17 SUBJECT HEADING: Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes ACTION: Final rule SUMMARY: This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes, that requires inspections to detect leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG), and eventual replacement of those assemblies with new or serviceable assemblies. This amendment is prompted by reports of leakage of hydraulic fluid from lock jack assemblies due to a manufacturing forging defect that extends through the wall of the lock jack assembly. The actions specified by this AD are intended to prevent leakage of hydraulic fluid from the lock jack assemblies of the MLG, which, in conjunction with a hot brake, could cause a fire in the MLG bay. DATES: Effective March 31, 1997. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of March 31, 1997. ADDRESSES: The service information referenced in this AD may be obtained from British Aerospace Holding, Inc., Avro International Aerospace Division, P.O. Box 16039, Dulles International Airport, Washington, DC 20041-6039. This information may be examined at the Federal Aviation Administration (FAA), Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. FOR FURTHER INFORMATION CONTACT: Tim Backman, Aerospace Engineer, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (206) 227-2797; fax (206) 227-1149. SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain British Aerospace Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes was published in the Federal Register on August 27, 1996 (61 FR 44006). That action proposed to require an inspection to identify affected lock jack assemblies by serial number. That action also proposed to require repetitive inspections of certain lock jack assemblies to detect leakage of hydraulic fluid from the lock jack assemblies, and, if leakage is detected, replacement of the lock jack assemblies with new or serviceable assemblies. That action also proposed to require eventual replacement of the lock jack assemblies with new or serviceable assemblies. Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were submitted in response to the proposal or the FAA's determination of the cost to the public. Conclusion The FAA has determined that air safety and the public interest require the adoption of the rule as proposed. Cost Impact The FAA estimates that 52 airplanes of U.S. registry will be affected by this AD. To accomplish the required inspections will take approximately 1 work hour per airplane, per inspection, at an average labor rate of $60 per work hour. Based on these figures, the cost impact of the required inspections on U.S. operators is estimated to be $3,120, or $60 per airplane, per inspection cycle. To accomplish the required replacement of the lock jack assembly will take approximately 1 work hour per airplane, at an average labor rate of $60 per work hour. Required parts will be provided by the manufacturer at no cost to the operators. Based on these figures, the cost impact of the required replacement on U.S. operators is estimated to be $3,120, or $60 per airplane. The cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. Regulatory Impact The regulations adopted herein will not have substantial direct effects on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. For the reasons discussed above, I certify that this action (1) is not a "significant regulatory action" under Executive Order 12866; (2) is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption "ADDRESSES." List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39 - AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 - [Amended] 2. Section 39.13 is amended by adding the following new airworthiness directive: REGULATORY TEXT: 97-04-17 BRITISH AEROSPACE REGIONAL AIRCRAFT LIMITED, AVRO INTERNATIONAL AEROSPACE DIVISION (formerly British Aerospace, plc; British Aerospace Commercial Aircraft Limited): Amendment 39-9942. Docket 96-NM-48-AD. Applicability: Model BAe 146 series airplanes and Model Avro 146-RJ series airplanes having lock jack assemblies of the main landing gear as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991; certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG), which, in conjunction with a hot brake, could cause a fire in the MLG bay; accomplish the following: (a) Within 30 days after the effective date of this AD, verify the serial number of all lock jack assemblies, part number 104275001, of the MLG. NOTE 2: Verification may be accomplished by a review of appropriate records. (1) If no lock jack assembly has a serial number as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, no further action is required by this paragraph. (2) If any lock jack assembly has a serial number as listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, prior to further flight, perform a visual inspection to detect any leakage of hydraulic fluid from the lock jack assembly, in accordance with the service bulletin. (i) If no leakage of hydraulic fluid is detected, thereafter, repeat the inspection at intervals not to exceed 30 days, until the requirements of paragraph (b) of this AD are accomplished. (ii) If any leakage of hydraulic fluid is detected, prior to further flight, replace the lock jack assembly with a new or serviceable unit that does not have one of those serial numbers, in accordance with the service bulletin. (b) Within 6 months after the effective date of this AD, replace any lock jack assembly having a serial number listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, with a new or serviceable assembly that does not have one of those serial numbers, in accordance with the service bulletin. (c) As of the effective date of this AD, no person shall install a lock jack assembly, having any serial number listed in British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, on any airplane. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113. NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (e) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (f) The inspections and replacements shall be done in accordance with British Aerospace Inspection Service Bulletin SB 32-103, Revision 1, dated February 22, 1991, which contains the specified list of effective pages: Page Number Revision Level Shown on Page Date Shown on Page 1, 2, Appendix A1 Page 1-3 1 February 22, 1991 3, Appendix A1 Page 4 Original June 15, 1990 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from British Aerospace Holding, Inc., Avro International Aerospace Division, P.O. Box 16039, Dulles International Airport, Washington, DC 20041-6039. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (g) This amendment becomes effective on March 31, 1997. FOOTER:
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