AD 91-13-11

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AD Number:
91-13-11
Document Type:
AD Final Rules
Docket Number:
90-NM-274-AD
Subject Heading:
BOEING Model 747 Series Airplanes
Subject:
Wire Bundles
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/22/1991
Make:
The Boeing Company
Model:
747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-200...Show more
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Superseded AD: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Superseded By: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: 91-13-11
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-274-AD

AMENDMENT:   39-7042

AD NUMBER:   91-13-11

SUBJECT HEADING:   BOEING Model 747 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 22, 1991.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-13-11 BOEING: Amendment 39-7042. Docket No. 90-NM-274-AD. Supersedes AD 89- 21-07.

Applicability: Model 747 series airplanes, listed in Boeing Service Bulletin 747-35- 2059, Revision 2, dated March 22, 1990, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent chafing of wire bundles, subsequent arcing and burn-through of adjacent oxygen lines, and a resulting potential fire hazard, accomplish the following:

A. For airplanes listed in Boeing Service Bulletin 747-35-2059, dated August 17, 1989: Within 60 days after October 16, 1989 (the effective date of Amendment 39-6343, AD 89- 21-07), install protective sleeves on wire breakouts and oxygen lines in the upper deck left sidewall in accordance with Boeing Service Bulletin 747-35-2059, dated August 11, 1989; Revision 1, dated November 22, 1989; or Revision 2, dated March 22, 1990.

B. For airplanes listed in Boeing Service Bulletin 747-35-2059, Revision 2, dated March 22, 1990, that are not subject to paragraph A. of this AD: Within 60 days after the effective date of this amendment, install protective sleeves on wire breakouts and oxygen lines in the upper deck left sidewall in accordance with Boeing Service Bulletin 747-35-2059, Revision 2, dated March 22, 1990.

C. 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, Seattle Aircraft Certification Office (ACO), 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, Seattle ACO.

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 Airplane Group, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

This amendment supersedes Amendment 39-6343, AD 89-21-07.

This amendment (39-7042, AD 91-13-11) becomes effective on July 22, 1991.

FOOTER: