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Airworthiness directives › 2012-22-03

AD 2012-22-03 Airworthiness Directives; The Boeing Company Airplanes

2012-12-31
2012-11-26
39-17239
FAA-2009-0794
Airframe
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Models named: 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

This AD applies to all The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes, certificated in any category.

Compliance

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

Required actions

For Groups 1 through 4 airplanes, as identified in Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010: At the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010, except as provided by paragraphs (p) and (q) of this AD, do a one-time general visual inspection to identify any existing structural repair manual (SRM) repairs of the upper main sill outer chord of the left and right main entry door 1, as applicable. Remove any existing SRM outer chord repair that is found, before further flight, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010. In addition, after doing the one-time general visual inspection to identify any existing SRM repairs of the upper main sill outer chord of the left and right main entry door 1, before further flight, do a detailed inspection for cracks of the main upper sill outer chord, web, and frame attachment angles (or clips) of the left and right main entry door 1, as applicable. Do all actions in accordance with Part 2 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010. If no crack and no existing SRM outer chord repair is found during any inspection required by this paragraph, at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010, except as provided by paragraphs (p) and (q) of this AD, repeat thereafter the detailed inspection for cracks, at intervals specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010, until the outer chord repair specified in Part 3 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2785, Revision 1, dated July 15, 2010, is installed.

Unsafe condition

This AD was prompted by reports of cracks in the main entry door number 1 upper main sill outer chord, along the bend radius of the chord on several airplanes. We are issuing this AD to detect and correct such cracks, which could result in loss of structural integrity of the airplane.

Affected ADs

AD 2009-18-07, Amendment 39-16003 (74 FR 43629, August 27, 2009); and AD 2010-01-01, Amendment 39-16157 (75 FR 1533, January 12, 2010); affect this AD.

Read the original on the Federal Register →

The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1