AD 92-25-05
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; British Aerospace Model ATP Series Airplanes |
Unsafe Condition
Structural failure of certain brake torque plates and accompanying brake failure due to life limitations for part numbers AHA 1777 and AHA 1650.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the FAA-approved Mandatory Life Limitations (Airframe) Section by deleting existing life limitations for brake torque plates part numbers AHA 1777 and AHA 1650, and adding component life limitations of 14,500 landings for AHA 1777 and 10,000 landings for AHA 1650. Operators may use alternative methods if approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 400 landings after the effective date of this AD (December 22, 1992).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Model ATP series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Brake Torque Plates
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-25-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-25-05 Document Type: AD Final Rules Docket Number: 91-NM-269-AD Subject Heading: Airworthiness Directives; British Aerospace Model ATP Series Airplanes Subject: Brake Torque Plates Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/22/1992 Make: BAE Systems (Operations) Limited Model: ATP Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-25-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-269-AD AMENDMENT: 39-8420 AD NUMBER: 92-25-05 SUBJECT HEADING: Airworthiness Directives; British Aerospace Model ATP Series Airplanes ACTION: SUMMARY: DATES: Effective on December 22, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-25-05 BRITISH AEROSPACE: Amendment 39-8420. Docket No. 91-NM-269-AD. Applicability: All Model ATP series airplanes, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent structural failure of certain brake torque plates and accompanying brake failure, accomplish the following: (a) Within 400 landings after the effective date of this AD, revise the FAA-approved Mandatory Life Limitations (Airframe) Section, Chapter 5, Section 05-10-11, Table 1, page 4, of the British Aerospace ATP Aircraft Maintenance Manual, by deleting the existing life limitations for brake torque plates, part numbers AHA 1777 and AHA 1650, and adding the component life limitations listed in Table 1 below. The Maintenance Manual revision may be accomplished by inserting a copy of this AD into the Mandatory Life Limitations (Airframe) Section of the ATP Aircraft Maintenance Manual. Once this revised page of the Maintenance Manual is available from British Aerospace and is inserted into the Maintenance Manual, the copy of this AD may be removed. TABLE 1 continued MSI/SSI ITEM DESCRIPTION PART NUMBER LIFE LIMITATION 32-42-00-022 Brake torque plate (Post Dunlop Mod 2541) AHM8857 Assembly AHA 1777 14,500 landings 32-42-00-022 Brake torque plate (Pre Dunlop Mod 2541) AHM8857 Assembly AHA 1650 10,000 landings (b) 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: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) This amendment becomes effective on December 22, 1992. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_92-25-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-25-05 Document Type: AD Final Rules Docket Number: 91-NM-269-AD Subject Heading: Airworthiness Directives; British Aerospace Model ATP Series Airplanes Subject: Brake Torque Plates Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/22/1992 Make: BAE Systems (Operations) Limited Model: ATP 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: 92-25-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-269-AD AMENDMENT: 39-8420 AD NUMBER: 92-25-05 SUBJECT HEADING: Airworthiness Directives; British Aerospace Model ATP Series Airplanes ACTION: SUMMARY: DATES: Effective on December 22, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-25-05 BRITISH AEROSPACE: Amendment 39-8420. Docket No. 91-NM-269-AD. Applicability: All Model ATP series airplanes, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent structural failure of certain brake torque plates and accompanying brake failure, accomplish the following: (a) Within 400 landings after the effective date of this AD, revise the FAA-approved Mandatory Life Limitations (Airframe) Section, Chapter 5, Section 05-10-11, Table 1, page 4, of the British Aerospace ATP Aircraft Maintenance Manual, by deleting the existing life limitations for brake torque plates, part numbers AHA 1777 and AHA 1650, and adding the component life limitations listed in Table 1 below. The Maintenance Manual revision may be accomplished by inserting a copy of this AD into the Mandatory Life Limitations (Airframe) Section of the ATP Aircraft Maintenance Manual. Once this revised page of the Maintenance Manual is available from British Aerospace and is inserted into the Maintenance Manual, the copy of this AD may be removed. TABLE 1 continued MSI/SSI ITEM DESCRIPTION PART NUMBER LIFE LIMITATION 32-42-00-022 Brake torque plate (Post Dunlop Mod 2541) AHM8857 Assembly AHA 1777 14,500 landings 32-42-00-022 Brake torque plate (Pre Dunlop Mod 2541) AHM8857 Assembly AHA 1650 10,000 landings (b) 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: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) This amendment becomes effective on December 22, 1992. 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.