Service difficulty report · Pressure Deck · Boeing 7377H4

Difficulty date
June 19, 2025
Submitted
July 15, 2025
Operation
Air carrier
Aircraft
N429WN
Make and model
Boeing 7377H4
Aircraft serial
33658
Aircraft time
72,793 hours, 43,149 cycles
Part
Pressure Deck
Condition
Cracked
Location
Zn 100 Fus Lower
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

CRACK INDICATION FOUND ON HORIZONTAL PRESSURE DECK WEB AT LBL 31 BETWEEN STA 663 TO STA 675 AT MAIN WHEEL WELL COMPARTMENT. CRACK LENGTH: 0.250 IN. APPROX. REWORKED AREA OF TOOLING MARK LOCATED ON WEB AT LBL 60 BTW STA 663 TO STA 675 AND FOUND WITHIN LIMITS DUE TO NOT EXCEED 10% OF ALLOWABLE DAMAGE I.A.W B737-700 SRM 53-40-13-1A-1. ALLOWABLE DAMAGE 1. STEP 4.C.(2)(A); FIGURE ?G?. MEASURE OF REWORKED AREA ARE: L= 2.477? ;W= 0.663? AND Y= 0.006. VERIFIED NOMINAL THICKNESS OF WEB IS: 0.063? I.A.W B737-700 SRM 53-40-51-0I-2; IDENTIFICATION 2. FIGURE 3; TABLE 3; ITEM 19.; PERFORMED PERMANENT REPAIR ON PRESSURE DECK WEB LBL 30 TO LBL 60 STA 663 TO STA 675 AT PASSENGER CABIN IAW SRM 53-40-51-2R-2 REPAIR 2.

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