SDR SWAA2021102723822

Service difficulty report · Support · Boeing 7377H4

Difficulty date: September 28, 2021
Submitted: October 27, 2021
Operation: Air carrier
Aircraft: N263WN
Make and model: Boeing 7377H4
Aircraft serial: 32520
Aircraft time: 46,043 hours, 27,465 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Support
Condition: Corroded
Location: Fuselage
Stage of operation: UK
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

CORROSION ON FLOOR TO SIDEWALL SUPPORT RBL 21; WL 154; BS 727+13; 727A+2; 727A+12; 727A+19; 727B+2; 727B+10; 727B+15; 727C+1; AND 727C+5. REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT. MEASURES BS727B+10: L=0.930'; W=0.350'; D=0.010'.ORIGINAL THICKNESS 0.040'. MATERIAL REMOVED= 0.010'. REMAINING MATERIAL THICKNESS=0.030'.THE SIDEWALL SUPPORT IS OUT OF LIMITS. IAW SRM 53-00-53-1A-2, ALLOWABLE DAMAGE 2; STEP 4.2A.. ACCOMPLISHED ON CARD TTG8Q006Q898.

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