AD 85-07-05 R1

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AD Number:
85-07-05 R1
Document Type:
AD Final Rules
Docket Number:
89-NM-25-AD
Subject Heading:
LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes
Subject:
AC/DC Electrical Power
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
11/13/1989
Make:
Lockheed Martin Corporation
Model:
L-1011-385-1 | L-1011-385-1-14 | L-1011-385-1-15 | L-1011-385-3
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Superseded AD: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Superseded By: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: 85-07-05 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-NM-25-AD

AMENDMENT:   39-6354

AD NUMBER:   85-07-05 R1

SUBJECT HEADING:   LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective on November 13, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-07-05 R1 LOCKHEED AERONAUTICAL SYSTEMS COMPANY: Amendment 39- 5028 as revised by Amendment 39-6354. Docket No. 89-NM-25-AD.

Applicability: Model L-1011 series airplanes, Serial Numbers -1002 through -1221 that have not been modified in accordance with Lockheed Service Bulletin 093-21-184, dated November 21, 1983, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To minimize the potential for unrecoverable loss of all AC/DC electrical power, including the emergency bus, accomplish the following:

A. Within 3,600 flight hours after May 9, 1985 (the effective date of Amendment 39- 5028), extend and reroute Fenwall thermal overheat sensors below the Mid-Electrical Service Center (MESC) floor, remove excess flow sensors, and modify the structure below the MESC floor in accordance with the Lockheed Service Bulletin 093-21-214, Revision 1, dated December 9, 1983; Revision 2, dated September 10, 1984; Revision 3, dated April 21, 1986; or Part 1 of the Accomplishment Instructions of Revision 4, dated August 15, 1988.

B. Within 3,600 flight hours after May 9, 1985 (the effective date of Amendment 39- 5028), extend the duct isolation barrier in accordance with Lockheed Service Bulletin 093-21-222, Basic Issue, dated January 9, 1984; Revision 1, dated April 30, 1984; or Revision 2, dated August 15, 1988.

C. Within 3,600 flight hours after the effective date of this amendment, further extend the duct isolation barrier, add overheat sensors, and revise the insulation blanket retention, in accordance with Lockheed Service Bulletin 093-21-227, Basic Issue, dated August 15, 1988.

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, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Los Angeles Aircraft Certification Office.

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 Lockheed Aeronautical Systems Company, P.O. Box 551, Burbank, California 91520, Attention: Commercial Order Administration, Department 65-33, Unit 20, Plant A-1. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California.

This AD revises Amendment 39-5028, AD 85-07-05, which became effective on May 9, 1985.

This amendment (39-6354, AD 85-07-05 R1) becomes effective on November 13, 1989.

FOOTER: