Service difficulty report · Skin · Boeing 7879

Difficulty date
December 19, 2020
Submitted
January 27, 2021
Operation
Air carrier
Aircraft
N438AM
Make and model
Boeing 7879
Aircraft serial
43862
Aircraft time
17,149 hours, 1,907 cycles
Part
Skin
Condition
Dented
Location
Rt Wing
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING TRANSIT CHECK, IT WAS DETECTED DAMAGES ON RIGHT WING. MAINTENANCE PERSONNEL PERFORMED REVISION, DETECTING SEVERAL DENTS, GOUGES, NICKS, SCRATCHES, DELAMINATION AND STATIC DISCHARGER NUMBER 4 ON RIGHT WING. THE WO´S 7193314, 7193319, 7193321, 7193322, 7193325, 7193326 AND 7193353 WERE ISSUED TO REPAIR THE DAMAGES DETECTED; A DENT OF 5.00" LENGTH, 3.00" WIDTH AND 0.128" DEPTH ON REMOVABLE WING TIP LEADING EDGE SKIN INBOARD ON RH WING, A GOUGE OF 7.5" LENGTH, 2.5" WIDTH AND 0.051" DEPTH ON REMOVABLE WING TIP LEADING EDGE SKIN INBOARD ON RH WING, A DENT WAS VERIFIED AND FOUND OUT LIMITS IAW SRM B787-A-57-31-01-02A-661A-A, TABLE 1, FIGURE 6, PARAGRAPH 3, THE LEADING EDGE SKIN INBOARD WAS REMOVED IAW DMC-B787-A-57-41-11-00A-520A-A, A GOUGE WAS BLENDED IAW SRM B787-A-57-31-01-02A-661A-A, TABLE 1, FIGURE 5, PARAGRAPH 3, A HFEC INSPECTION TO SURFACE AND INTO OPEN FASTENER HOLES WAS PERFORMED IAW B787 NDTM PART 6, 51-00-01, PROCEDURE 1; 51-00-02 PROCEDURE 1, WITH NO CRACKS FOUND, INSPECTED BOTH INSIDE AND OUTSIDE OF SKIN DENT, DENTS WERE RE-FORMED TO THE ORIGINAL CONTOUR IAW BAC 5300, A MEASUREMENT ULTRASONIC INSPECTION AND HFEC INSPECTION WERE PERFORMED IAW B787 NDTM PART 4 51-00-10, PROCEDURE 1 AND PART 6 51-00-01, PROCEDURE 1, NO CRACKS FOUND AND ORIGINAL GAGE OF 0.063” WITH REMAINING THICKNESS FOUND OF 0.061” AND THE DAMAGE WAS RE CONFORMED AS PERMANENT REPAIR IAW MESSAGE BOEING NUMBER AMX-AMX-20-0806-08B; A NICK ON RH WING TIP RAKED WING TIP MIDDLE LEADING EDGE AT WS 1379.35, A NICK ON RH WING TIP RACKED WING TIP WAS REMOVED IAW SRM B787-A-57-30-01-03A-661A-A, TABLE 1, HFEC INSPECTION WAS PERFORMED IAW B787 NDTM PART 6, 51-00-01, PROCEDURE 1; PART 4, 51-00-10 PROCEDURE 1; SRM B787-A-57-30-01-03A-661A-A PARAGRAPH 3.C. WITH NO CRACKS FOUND, A UT-PE THICKNESS MEASUREMENT PERFORMED WITH MINIMUM OF 0.101” WAS FOUND AND ORIGINAL GAGE 0.102”, WITHIN LIMITS, A CHEMICAL CONVERSION COATING WAS APPLIED IAW SRM B787-A-57-30-01-03A-661A-A, PARAGRAPH 2.E(3), ALL CORRECT.

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