AD 72-25-03

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AD Number:
72-25-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 727 Series Airplanes
Subject:
Main Landing Gear Trunnion Support Beam
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/02/1973
Make:
The Boeing Company
Model:
727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series | 727C Series
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Superseded AD: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Superseded By: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: 72-25-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1596

AD NUMBER:   72-25-03

SUBJECT HEADING:   BOEING Model 727 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective March 2, 1973.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
72-25-03 BOEING: Amdt. 39-1560 as amended by Amendment 39-1575 is further amended by Amendment 39-1596. Applies to main landing gear beams made from 7079-T6 material on all Model 727 Series Airplanes certificated in all categories.
Compliance required as indicated:
To detect cracks in the main landing gear trunnion support beam, accomplish the following:
(a) Inspect all beams in accordance with (c) below within 600 hours time in service or 90 days from the effective date of this AD, whichever occurs first, and at intervals thereafter not to exceed 600 hours time in service or 90 days, whichever occurs first.
(b) Inspect all beams in accordance with (d) below within 1200 hours time service or 180 days, whichever occurs first, except parts nos. 65-16230-23, -24, -25 and -26, and those beams sleeved in accordance with Boeing Service Bulletin No. 57-122 dated October 15, 1971, or later FAA approved revisions.
(c) Ultrasonically inspect the bearing bore in accordance with Boeing Service Bulletin No. 57-119, Revision 2, dated 14 November 1972 or later FAA approved revision, or an equivalent inspection approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region.
(d) Eddy-current inspect inside the trunnion bore in accordance with Boeing nondestructive test document No. D6-7170, Part 6, 57-10-27 Figure 1, or an equivalent inspection approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. Reinstall the bearing in accordance with Boeing Service Bulletin No. 57-120, Revision 1, dated 9 July 1971 or later FAA approved revisions.
(e) Any beam in which evidence of a crack in the bearing bore is found must, prior to further flight, be replaced with a beam inspected per this AD and found to be uncracked, or reworked in accordance with instructions in Boeing Service Bulletin No. 57-120, Revision 1, dated 9 July 1971 or later FAA approved revisions, or in accordance with instructions approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region.
(f) (1) Landing gear beams, part numbers 65-16230-23, -24, -25 and -26, and those beams sleeved in accordance with Boeing Service Bulletin No. 57-122 dated 15 October 1971 or later FAA approved revisions, must be replaced with the redesigned beam (P/N 65-62335) no later than 1 July 1974.
(2) All other beams must be replaced with the redesigned beam (P/N 65-62335) no later than 1 January 1974.
(g) Airplanes having cracked landing gear beams which require replacement under this AD may be flown in accordance with FAR 21.197 to a base where the replacement of parts can be accomplished.
(h) As an alternative to the inspection required in paragraph (b) above, those beams which will be replaced prior to July 1, 1973 need not be inspected in accordance with paragraph (d) above. Those beams allowed to remain in service beyond the time intervals specified in paragraph (b) must be replaced by July 1, 1973. Operators must assure themselves of parts availability prior to electing this alternative.
This supersedes Amendment 39-1162 as amended by 39-1306 (AD 71-5-4).
Amendment 39-1560 became effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated 10 November 1972.
Amendment 39-1575 became effective 26 December 1972.
This Amendment 39-1596 becomes effective March 2, 1973.

FOOTER: