Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
October 17, 2023
Submitted
October 27, 2023
Operation
Air carrier
Aircraft
N924WN
Make and model
Boeing 7377H4
Aircraft serial
36628
Aircraft time
50,130 hours, 30,347 cycles
Part
Stiffener
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
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

LT HAND VAPOR BARRIER STIFFENER AT LBL 25' CRACKED.<[01] SUMMARY :REMOVED CRACKED STIFFENER AT LBL25' AS PER B 737 SRM 51-40-02-0G-0.LOCATED AND DRILLED NEW STIFFENER AS L/H VAPER BARRIER AT LBL 25' AS PER REF B/737 SRM 51-40-05-0G-0.INSTALLED NEW STIFFENERS AT L/H VAPOR BARRIER AT LBL 25' AS PER REF B/737 SRM 51-40-02-0G-0AND DW111A1001.;[02] ALL STEPS COMPLETED.;[03] RII... VERIFIED REMOVED AND INSTALLED NEW STIFFENERS AT L/H VAPOR BARRIER AT LBL 25'

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