Service difficulty report · Slat · Boeing 7377H4

Difficulty date
April 30, 2022
Submitted
June 14, 2022
Operation
Air carrier
Aircraft
N286WN
Make and model
Boeing 7377H4
Aircraft serial
32471
Aircraft time
57,746 hours, 34,276 cycles
Part
Slat
Condition
Cracked
Location
R/H 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

RT WING #6 SLAT LWR SURFACE HAS A CRACK AT AFT FASTENER SLAT STA 202.45. 8-8 / [01] PERFORMED HFEC AT SUSPECTED CRACK IAW NDTM PART 6; 51-00-00 PROCEDURE 23. CRACK CONFIRMED AT AFT FASTENER. CRACK LENGTH:0.984'<BR>[NORTEC 600 ; B/C 166317 ; CALIB.DUE-10/22];04] PERFORMED ROTO INSP. ON EXISTING HOLES IN REPAIR AREA R/T WING #6 SLAT LWR SURFACE @ AFT FASTENER SLAT STA 202.45 IAW B737 NDT PART 6 51-00-00 PROC. 16. INITIAL SLAT CRACK FOUND THROUGH HOLE FASTENER AND ADDITINAL CRACK FOUND 2 FASTENERS HOLES O/B. EQUIP: NORTEC 600 B/C 166316 CAL DUE 10/22;[06] CUT-OUT DAMAGE AREA AT R/W. #6 SLAT AS PER B-737-700 SRM. 57-42-01-2R-8 F. [1] FIGURE 202 SHEET 3;[07] ROUGHNESS SURFACE SMOOTHER THEN 63 MICRO INCHES RA. AS PER B-737-700 SRM. 57-42-01-2R-8 F. [1] B TOOL USED B/C 172331;[08] FABRICATED REPAIR PARTS; FILLER FROM 7075-T6 0.063' AND DOUBLER FROM 7075-T6 0.071'; REF B737 SRM 57-42-01-2R-8 FIG 20214] INSTALLED REPAIR PART AT R/W. SLAT #6 LOWER SURFACE AS PER B-737-700 SRM. 57-42-01-2R-8 & B-737-700 SRM. 51-40-02-0G-0;[17] INSTALLED ACCESS PANELS #623CB; 623DB; 623EB; AND FLEX SKIN PANEL AS PER B-737-700 SRM.51-40-02-0;[18] ACCOMPLISHED PERMANENT REPAIR AT R/W. SLAT #6 AS PER B-737-700 SRM. 57-42-01-2R-8;[19] VERIFIED STEPS 17 AND 18.

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