Service difficulty report · Frame · Boeing 7377H4

Difficulty date
May 3, 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
Frame
Condition
Cracked
Location
L1 Door Cutout
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

ABOVE L1 CUTOUT LWR END OF FRAME BS 312 CRACKED AT RADIUS BETWEEN S-5L AND S-6L. 8-25 / FABRICATED REPAIR PART FOR STA 312 UPPER CHORD BETWEEN S-5L - S6L; MATERIAL USED 7075-O 0.063' PO#1742517 REF B737-700 SRM 53-10-07-2R-1 FIG 203 TABLE 201.;[03] HEAT TREATED ANGLE REPAIR REF OP 84 AND BAC5602.;[04] VERIFIED STEPS 1;2 & 3TRIMMED OUT DAMAGED AREA AT STA 312 UPPER CHORD BETWEEN S-5L AND S-6L REF B737-700 SRM 51-10-02-0G-0 AND 53-10-07-2R-1 FIG 202.PERFORMED HFEC INSP ON CUT OUT AREA. IAW B 737 NDT PART 6 51-00-00 PROCES 23. TOOL NORTEC 600. BC 166316. CALIB DUE 10-8-22. NO CRACKS FOUND.;[08] PERFORMED HFEC ROTO INSP ON FASTENER OPEN HOLES. IAW B 737 NDT PART 6 51-00-00 PROCES 16. TOOL NORTEC 600. BC 166316. CALIB DUE 10-8-22. NO CRACKS FOUND. LOCATED AND DRILLED ANGLE REPAIR AT STA 312 UPPER CHORD BETWEEN S-5L AND S-6L REF B737-700 SRM 53-10-07-2R-1 FIG 203.TREATED AND PRIMED REPAIR PART REF B737-700 SRM 51-20-01-0G-0.;[14] VERIFIED 13. OK TO INSTALL REPAIR.MIXED BMS 5-95 SEALANT AT 2.20 PM 05-17-22 SQUEEZE OUT TIME BY 4.20 PM 05-17-22.;[16] INSTALLED ANGLE REPAIR AT STA 312 UPPER CHORD BETWEEN S-5L AND S-6L REF B737-700 SRM 53-10-07-2R-1 FIG 203ANGLE REPAIR INSTALLED.;APPLIED CIC AT REPAIR AREA REF B737-700 SRM 51-20-01-0G-0.;[20] ACCOMPLISHED ANGLE REPAIR AT BS 312 UPPER CHORD BETWEEN S-5L AND S-6L REF B737-700 SRM 53-10-07-2R-1 FIG 202 AND 203.

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