SDR SWAA2021081799453

Service difficulty report · Web · Boeing 7377H4

Difficulty date: July 28, 2021
Submitted: August 17, 2021
Operation: Air carrier
Aircraft: N491WN
Make and model: Boeing 7377H4
Aircraft serial: 33867
Aircraft time: 53,758 hours, 31,898 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Condition: Cracked
Location: Bs 675 Lbl 31
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

WHILE ACCOMPLISHING CCN:753-201-00-02; FOUND 1 INCH CRACK AT BS 675 LBL 31 WL 203 COMMON TO THE HORIZONTAL PRESSURE DECK. STARTED REMOVING FASTENERS IAW SRM 53-40-51-2R-2 STEP 4-A. REMOVED DAMAGED WEB IAW SRM CH 53-40-51-2R-2 PAR.4 C.1-3(D). HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT AND ALL EXISTING FASTENER HOLES IN THE REPAIR AREA IAW NDT PART 6 51-00-00 PROCEDURES 23 AND 16. NO CRACKS FOUND. INSTALLED REPAIR PARTS IAW SRM 53-40-51-2R-2. PAR 4.L FIG 203/REPAIR 2.

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