AD 88-07-51 R1

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AD Number:
88-07-51 R1
Document Type:
AD Final Rules
Docket Number:
88-NM-210-AD
Subject Heading:
Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1...Show more
Subject:
Hydraulic Pump
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/02/1989
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Superseded AD: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Superseded By: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: 88-07-51 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   88-NM-210-AD

AMENDMENT:   39-6311

AD NUMBER:   88-07-51 R1

SUBJECT HEADING:   Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective October 2, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
88-07-51 R1 LOCKHEED AERONATUICAL SYSTEMS COMPANY: Amendment 39- 5923 as revised by Amendment 39-6311. (Docket No. 88-NM-210-AD)

Applicability: Model L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 series airplanes, as listed in Lockheed TriStar L-1011 Service Bulletin 093-29-A088, dated April 14, 1988, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent a fire from a failed AC electrical motor-driven hydraulic pump electrical connector, in combination with leaking hydraulic fluid from the failed electro-hydraulic component, accomplish the following:

A. Within 100 flight hours after June 3, 1988 (which is the effective date of Amendment 39-5923), accomplish the following:

1. On the Flight Engineer/Second Officer's (FE/SO) overhead CB panel CB2, open and collar circuit breakers L12 "AC Pump B3" and L22 "AC Pump C3", using PACO plastic ring P/N S-4933959-503 or equivalent.

2. As a verification that power has been removed from affected pumps, on the FE/SO hydraulic system control panel, cycle the AC pumps switch lights and verify that the "ON" legends do not illuminate.

B. Accomplishment of the requirements of paragraph A., above, in accordance with Lockheed TriStar L-1011 Alert Service Bulletin 093-29-A088, dated April 14, 1988, is considered an acceptable means of compliance with this AD.

C. Installation of an AC Hydraulic Pump Magnetic Circuit Breaker Panel (MCBP) in the Mid-Electrical Service Center (MESC) and associated aircraft wiring, in accordance with Lockheed TriStar L-1011 Service Bulletin 093-29-088, Revision 1, dated March 7, 1989, constitutes terminating action for the requirements of paragraph A., above. The hydraulic pumps may then be reactivated by removing the circuit breaker collars installed in accordance with paragraph A.1., above, and closing the circuit breakers.

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: This 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, FAA, Northwest Mountain Region.

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 the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California.

This amendment (39-6311) amends Amendment 39-5923, AD 88-07-51 which became effective on June 3, 1988.

This amendment (39-6311, AD 88-07-51 R1) becomes effective on October 2, 1989.

FOOTER: