AD 88-24-12

AD Final Rules - DRS_88-24-12.html
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AD Number:
88-24-12
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BOEING Model 727 Series Airplane
Subject:
Self-Locking Nut
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/23/1988
Make:
The Boeing Company
Model:
727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series | 727C 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Superseded AD: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Superseded By: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: 88-24-12
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-6068

AD NUMBER:   88-24-12

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 727 Series Airplane

ACTION:  

SUMMARY:  

DATES:   ; Effective December 23, 1988

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
88-24-12 BOEING: Amendment 39-6068. Applies to all Model 727 series airplanes, prior to line number 1620, not equipped with the safety bar modification described in Boeing Service Bulletin 727-32-275, Revision 2, dated March 30, 1984, certificated in any category. Compliance required within the next 3,500 flight cycles after the effective date of this AD, unless previously accomplished.

To prevent failure of the main landing gear (MLG) to extend as a result of loosening of the self-locking nut at the attachment of the downlock forward pushrod assembly to the downlock torque shaft, accomplish the following:

A. Modify airplanes listed in Boeing Service Bulletin 727-32-0237, Revision 5, dated July 7, 1988, by installing the bolt, washer, nut, and cotter pin called out in item 5 of Figure 5 of that service bulletin.

B. Modify airplanes listed in Boeing Service Bulletin 727-32-0353, Revision 1, dated July 7, 1988, by installing the bolt, washer, nut, and cotter pin in accordance with that service bulletin.

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 it 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 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 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, 39-6068, becomes effective December 23, 1988.

FOOTER: