Airworthiness directives › 2015-12-07
AD 2015-12-07 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-8F, 747-8 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model 747-8F and 747-8 series airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD, at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 747-57-2338, dated January 14, 2014: Do a general visual inspection to detect delamination damage of the lightning strike applique (LSA) on the LE VCK flaps at positions 6 through 9 (left wing) and 18 through 21 (right wing); and do all applicable corrective actions before further flight; in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-57-2338, dated January 14, 2014. Repeat the inspection of the LSA on the LE VCK flaps at positions 6 through 9 (left wing) and 18 through 21 (right wing) thereafter at the applicable intervals specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 747-57-2338, dated January 14, 2014.
Unsafe condition
This AD was prompted by reports of delamination damage to leading edge (LE) variable camber krueger (VCK) flaps. We are issuing this AD to detect and correct delamination damage to certain LE VCK flaps, which can reduce the lightning strike protection capability on certain LE VCK flaps and result in an uncommanded motion of the trailing edge flap system. Such uncommanded flap motion, without shutdown of the trailing edge or leading edge flaps, may cause unexpected changes in lift, potentially resulting in asymmetric lift and loss of control of the airplane.
Affected ADs
None.
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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