AD 91-04-09

AD Final Rules - DRS_91-04-09.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
91-04-09
Document Type:
AD Final Rules
Docket Number:
90-NM-232-AD
Subject Heading:
Airworthiness Directives; British Aerospace Model ATP Series Airplanes
Subject:
Aileron Primary Control Cables
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/22/1991
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Superseded AD: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Superseded By: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: 91-04-09
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-232-AD

AMENDMENT:   39-6896

AD NUMBER:   91-04-09

SUBJECT HEADING:   Airworthiness Directives; British Aerospace Model ATP Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective on March 22, 1991.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-04-09 BRITISH AEROSPACE: Amendment 39-6896. Docket No. 90-NM-232-AD.
Applicability: All Model ATP series airplanes, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To detect damaged wires in the primary flight control cables, accomplish the following:

A. For airplanes in Pre-Modification 10060A configuration:

1. Within 250 hours time-in-service after the effective date of this AD, and thereafter at intervals not to exceed 125 hours time-in-service, perform a visual inspection of the aileron primary control cables in the wings for wear and broken wires, in accordance with the Accomplishment Instructions in British Aerospace Service Bulletin ATP-27-26, dated April 5, 1990.

2. Prior to the accumulation of 2,500 hours time-in-service or within 200 hours time-in-service after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 2,500 hours time-in-service, perform a visual inspection of the fuselage primary control cables for wear and broken wires, in accordance with the Accomplishment Instructions in British Aerospace Service Bulletin ATP-27-26, dated April 5, 1990.

NOTE: The repetitive inspection intervals shown herein should not be interpreted as extending the published life limits of any control cables being inspected.

B. For airplanes in Post-Modification 10060A configuration: Within 125 hours time-in-service after the effective date of this AD, or within 750 hours time-in-service following accomplishment of Modification 10060A, whichever occurs later, and thereafter at intervals not to exceed 250 hours time-in-service, perform a visual inspection of the aileron primary control cables in the wings for wear and broken wires, in accordance with the Accomplishment Instructions in British Aerospace Service Bulletin ATP-27-26, dated April 5, 1990.

C. If defective wires are found as a result of the inspections required by this AD, prior to further flight, accomplish the following in accordance with the Accomplishment Instructions in British Aerospace Service Bulletin ATP-27-26, dated April 5, 1990.

1. In the event of a single wire break, the ends must be trimmed to lie flush with the cable assembly and a full and free check of control travel must be carried out to ensure that the wire ends do not "snag". If cables do "snag", the cable must be replaced prior to further flight, in accordance with the service bulletin.

2. If two or more wires are found to be broken, prior to further flight, replace the damaged cable and replace any associated damaged fairlead rollers, in accordance with the service bulletin.

D. 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, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

NOTE: Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.

E. 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 documents from the manufacturer may obtain copies upon request to British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 20041-0414. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

This amendment (39-6896, AD 91-04-09) becomes effective on March 22, 1991.

FOOTER: