AD 91-24-12

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AD Number:
91-24-12
Document Type:
AD Final Rules
Docket Number:
91-NM-133-AD
Subject Heading:
Airworthiness Directives; British Aerospace Model ATP Series Airplanes
Subject:
Landing Gear Hydraulic Selector Valves
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
01/07/1992
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Superseded AD: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Superseded By: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: 91-24-12
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   91-NM-133-AD

AMENDMENT:   39-8098

AD NUMBER:   91-24-12

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

ACTION:  

SUMMARY:  

DATES:   Effective on January 7, 1992.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-24-12 BRITISH AEROSPACE: Amendment 39-8098. Docket No. 91-NM-133-AD.
Applicability: Model ATP series airplanes, equipped with hydraulic selector valves part number AIR44880 and AIR44882, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent a gear-up landing, accomplish the following:

(a) Within 12 months after the effective date of this AD, modify and test the landing gear hydraulic selector valves in accordance with AP Precision Hydraulics Service Bulletin AIR44880-29-01, dated April 1991.

NOTE: British Aerospace Service Bulletin ATP-29-6, dated April 12, 1991, references AP Precision Hydraulics Service Bulletin AIR44880-29-01, dated April 1991.

(b) An alternative method 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 forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

(c) 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.

(d) The modification and testing requirements shall be done in accordance with AP Precision Hydraulics Service Bulletin AIR44880-29-01, dated April 1991. 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, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041-0414. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.

This amendment (39-8098, AD 91-24-12) becomes effective on January 7, 1992.

FOOTER: