AD 89-02-02

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AD Number:
89-02-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BOEING Model 757 Series Airplanes
Subject:
Antiskid Valve & Brake Metering Valve
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/08/1989
Make:
The Boeing Company
Model:
757-200 Series | 757-200CB Series | 757-200PF Series | 757-300 Series
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Superseded AD: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Superseded By: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: 89-02-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-6100

AD NUMBER:   89-02-02

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 757 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective February 8, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
89-02-02 BOEING: Amendment 39-6100. Applicability: Model 757 series airplanes, Group 1 and Group 2, as listed in Boeing Alert Service Bulletin 757-32A0081, dated June 24, 1988, certificated in any category.

Compliance: Required within the next 120 days after the effective date of this AD, unless previously accomplished.

To prevent the loss of airplane braking due to a single hydraulic failure, accomplish the following:

A. Inspect Group 1 and 2 airplanes left and right alternate antiskid valve module return ports for proper check valve configuration, and correct, if necessary, in accordance with Boeing Alert Service Bulletin 757-32A0081, dated June 24, 1988.

B. On Group 1 airplanes, remove the reducer unions installed in the left and right alternate brake metering valve module return ports and install check valves, in accordance with Boeing Alert Service Bulletin 757-32A0081, dated June 24, 1988.

C. 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, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send to the Manager, Seattle Aircraft Certification Office.

D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the inspections and/or modifications required by 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 Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6100, AD 89-02-02) becomes effective February 8, 1989.

FOOTER: