Service difficulty report · Pressure Blkhd · Boeing 7377H4

Difficulty date
March 4, 2026
Submitted
March 30, 2026
Operation
Air carrier
Aircraft
N486WN
Make and model
Boeing 7377H4
Aircraft serial
33852
Aircraft time
70,495 hours, 42,368 cycles
Part
Pressure Blkhd
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
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

AFT PRESSURE BULKHEAD HAD A CRACK INDICATION, EMANATING FROM RIVET AT STRINGER 7R LOWER GROUP OF FIVE, CLOSEST TO APEX. APPROX. 1/8' LONG. REJECTED STEP 43 FOR EDGE MARGIN IS OUT OF LIMITS OF -1 FILLER AND -2 FILLER. REFABRICATED -1 AND -2 REPAIR PARTS TO MEET EDGE MARGIN REQUIREMENTS FROM STEP 43; ADDRESSED ON STEPS 45; 46; 47; 48 I.A.W. SWA EA 26-153-00643-WIP5.;[03] VERIFIED REJECT FOR STEP 43 HAS BEEN CORRECTED REFABRICATED -1 AND -2 FILLERS LOCATED AND DRILLED WITH THE CORRECT EDGE DISTANCE IAW EA 26-153-00643-WIP 6;

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