AD 91-23-12

AD Final Rules - DRS_91-23-12.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
91-23-12
Document Type:
AD Final Rules
Docket Number:
91-NM-77-AD
Subject Heading:
Airworthiness Directives; LOCKHEED Model L-1011 Series Airplanes
Subject:
Main Landing Gear Braking Effectiveness
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/09/1991
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Superseded AD: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Superseded By: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: 91-23-12
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   91-NM-77-AD

AMENDMENT:   39-8081

AD NUMBER:   91-23-12

SUBJECT HEADING:   Airworthiness Directives; LOCKHEED Model L-1011 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective December 9, 1991.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
91-23-12 LOCKHEED: Amendment 39-8081. Docket No. 91-NM-77-AD.

Applicability: Model L-1011 series airplanes, equipped with BFGoodrich brake part numbers identified in paragraph (a) of this AD, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent the loss of main landing gear braking effectiveness, accomplish the following:

(a) Within 180 days after the effective date of this AD, inspect the brake part numbers shown below for wear. Any brake worn more than the maximum wear limit specified below must be replaced, prior to further flight, with a brake within this limit.


Type Certificated
Model Designation	Common Model
Designation	Maximum
GTOW	Brake
Part No.	Maximum Wear
Limit (inches)

L-1011-385-1
	
(-1)
	
430,000
	
2-1195-1
	
2.10

	
(-1)
	
430,000
	
2-1195-5
	
2.10

	
(-1)
	
430,000
	
2-1195-6
	
2.10

	
(-1)
	
430,000
	
2-1195-7
	
2.10

	
(-1)
	
430,000
	
2-1195-8
	
2.10

				
	
(-1)
	
430,000
	
2-1367
	
3.00

	
(-1)
	
430,000
	
2-1367-1
	
3.00

	
(-1)
	
430,000
	
2-1367-2
	
3.00

				
	
(-40)
	
440,000
	
2-1195-1
	
2.10

	
(-40)
	
440,000
	
2-1195-5
	
2.10

	
(-40)
	
440,000
	
2-1195-6
	
2.10

	
(-40)
	
440,000
	
2-1195-7
	
2.10

	
(-40)
	
440,000
	
2-1195-8
	
2.10

	
(-40)
	
440,000
	
2-1367
	
3.00

	
(-40)
	
440,000
	
2-1367-1
	
3.00

	
(-40)
	
440,000
	
2-1367-2
	
3.00

				
	
(-50)
	
450,000
	
2-1367-3
	
2.60

	
(-50)
	
450,000
	
2-1367-4
	
2.60

	
(-50)
	
450,000
	
2-1367-5
	
2.60

				

L-1011-385-1-14
	
(-100,-150,-200)
	
466,000
	
2-1367-3
	
2.60

	
(-100,-150,-200)
	
to
	
2-1367-4
	
2.60

	
(-100,-150,-200)
	
474,000
	
2-1367-5
	
2.60

	
(-250)
	
510,000
	
2-1367
	
3.00

	
(-250)
	
510,000
	
2-1367-1
	
3.00

	
(-250)
	
510,000
	
2-1367-2
	
3.00

				

L-1011-385-1-15
	
(-100,-150,-200)
	
466,000
	
2-1367-3
	
2.60

	
(-100,-150,-200)
	
to
	
2-1367-4
	
2.60

	
(-100,-150,-200)
	
474,000
	
2-1367-5
	
2.60

				
	
(-250)
	
510,000
	
2-1367
	
3.00

	
(-250)
	
510,000
	
2-1367-1
	
3.00

	
(-250)
	
510,000
	
2-1367-2
	
3.00

				

L-1011-385-3
	
(-500)
	
496,000
	
2-1367
	
3.00

	
(-500)
	
to
	
2-1367-1
	
3.00

	
(-500)
	
516,000
	
2-1367-2
	
3.00

NOTE: Lockheed Service Bulletin 093-32-253, dated March 29, 1991, contains additional information concerning Model L-1011 brake configurations.

(b) Within 180 days after the effective date of this AD, incorporate the maximum brake wear limits specified in paragraph (a) of this AD into the FAA-approved maintenance inspection program.

(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, Los Angeles 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, Los Angeles 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.

This amendment (39-8081, AD 91-23-12) becomes effective on December 9, 1991.

FOOTER: