AD 91-03-02

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AD Number:
91-03-02
Document Type:
AD Final Rules
Docket Number:
90-NM-191-AD
Subject Heading:
Airworthiness Directives; British Aerospace Model ATP Series Airplanes
Subject:
Generator Oil System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/25/1991
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Superseded AD: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Superseded By: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: 91-03-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-191-AD

AMENDMENT:   39-6865

AD NUMBER:   91-03-02

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

ACTION:  

SUMMARY:  

DATES:   Effective on February 25, 1991.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-03-02 BRITISH AEROSPACE: Amendment 39-6865. Docket No. 90-NM-191-AD.
Applicability: Model ATP series airplanes equipped with AC generators, part numbers BA03301, BA03301-01, and BA03301-02; certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent a rupture in the AC generators' oil system and subsequent loss of electrical power, accomplish the following:

A. Within 125 hours time-in-service after the effective date of this AD, and thereafter at intervals not to exceed 500 hours time-in-service, perform a visual inspection of the inlet oil strainer, and the outlet and vent oil filters, in accordance with Lucas Aerospace Service Bulletin BA03301-24-1, Revision 3, dated August 28, 1989. If evidence of debris is found, prior to further flight, replace the generator.

B. On generators having part numbers BA3301-01 and BA3301-02, within 1,250 hours time-in-service after the effective date of this AD, install a new outlet filter and a new vent filter, in accordance with Lucas Aerospace Service Bulletin BA03301-24-2, Revision 3, dated August 14, 1989. Repeat the inspection required by paragraph A. of this AD at intervals not to exceed 500 hours time-in-service.

C. Within 18 months after the effective date of this AD, install a new end plate, a new mainframe, and revised sealing features on the stator bolts and within the terminal block area, in accordance with Lucas Aerospace Service Bulletin BA03301-24-3, dated September 19, 1989. Incorporation of this modification terminates the requirement for the repetitive inspections and modifications required by paragraphs A. and B. of this AD.

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: The request should be submitted directly to the 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 17414, Dulles International Airport, Washington, D.C. 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 (39-6865, AD 91-03-02) becomes effective on February 25, 1991.

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