AD 76-20-08

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AD Number:
76-20-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes
Subject:
Main Landing Gear
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/17/1977
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Superseded AD: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Superseded By: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: 76-20-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2916

AD NUMBER:   76-20-08

SUBJECT HEADING:   LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective June 17, 1977.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
76-20-08 LOCKHEED-CALIFORNIA COMPANY: Amendment 39-2742 as amended by Amendment 39-2916. Applies to Model L-1011-385 series airplanes, certificated in all categories.

Compliance required as indicated.

To prevent possible collapse of a main landing gear assembly due to failure of one or both of the two main landing gear upper side brace spherical bearing trunnion retaining bolts, accomplish the following:

(a) Within the next 75 hours' time in service after the effective date of this AD accomplish the following checks, inspections, repairs or replacements as necessary, in accordance with accomplishment instructions of the Lockheed-California Company Alert Service Bulletin 093- 32-A115, dated September 1, 1976, or later FAA-approved revisions.

(1) Prior to each flight, perform a visual check of each main landing gear upper side brace trunnion joint and verify that the two trunnion bearing cap retaining bolts P/Ns 76754-18-71 or 69680v18-71 or 69680-18-71 are in place and that no obvious structural deformation of the trunnion bearing caps P/Ns 1504393-109 or -110 has occurred.

(2) If one or both retaining bolts P/Ns 76754-18-71 or 69680v18-71 or 69680-18-71 are missing or if a structural deformation of the trunnion bearing caps P/Ns 1504393-109 or -110 appears to have occurred, before further flight replace both retaining bolts and inspect the side brace support fitting P/Ns 1504393-107 or -108 and the trunnion bearing caps P/Ns 1504393-109 or -110 for structural damage and replace or repair as necessary the parts found to be damaged.

(3) The checks required by this AD may be performed by a flight crew member.

(b) Equivalent checks, inspections, repairs and replacements may be used when approved by the Chief, Aircraft Engineering Division, FAA, Western Region.

(c) Compliance is required on or before March 31, 1978, unless already accomplished:

Accomplish the modification of the main landing gear upper side brace trunnion joints in accordance with Paragraph 2, Accomplishment Instructions, of the FAA approved Lockheed-California Company Service Bulletin 093-32-115, Revision I, dated March 18, 1977 or later FAA approved revisions.

(d) Accomplishment of the modification of the upper side brace trunnion joints in accordance with paragraph (c) will remove the need for accomplishment of the requirements of paragraph (a).

Amendment 39-2742 became effective October 18, 1976.

This amendment 39-2916 becomes effective June 17, 1977.

FOOTER: