Service difficulty report · Stiffener · Boeing 737

Difficulty date
December 3, 2021
Submitted
April 28, 2022
Operation
Air carrier
Aircraft
N455WN
Make and model
Boeing 737
Aircraft serial
32462
Aircraft time
58,698 hours, 34,771 cycles
Part
Stiffener
Condition
Corroded
Location
Cabin
Stage of operation
IN
How discovered
O
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

SUPPLEMENTAL INFORMATION: CORROSION ON STIFFENER AT MID PASSENGER CABIN BS686 LBL70 WL203. ; / [01] REMOVED CORROSION ON DIFFERENTS AREAS OF STIFFENER AT MID PASSENGER CABIN PER REF SRM 51-10-01 L=1 W=.2 ;L=.250 W=.2 AND L=1 W=.2; [02] VERIFIED CORRECTIVE ACTION 1; [03] ADDED ENTRY 1 :REF SRM 51-10-02; [04] REQUIRE NDI INSPECTION FOR CRACK FREE CONDITION AND REMAINING THICKNESS ON BLENDED AREAS.; [05] ACCOMPLISHED UT INSPECTION IAW NDTM D6-37239 PART 4 51-00-00 PROC 2; LOWEST THICKNESS IS .069 SEE GRID. TOOL I.D E650 ATS2031<BR><BR>ACCOMPLISHED HFEC IAW NDTM D6-37239 PART 6 51-00-00 PROC 23. NO CRACKS FOUND. TOOL I.D. N600 ATS1465; [06] 'REFER TO FAULT TTG8Q009MUWR WHERE EA 21-153-03677 WAS ADDED AS A SUBTASK'.; [07] CORRECTED P/N.; [08] FINAL X AXIS TO BUTT LINE 2 (END BL) VALUE WILL NOT GO TO 70. ADDED FINAL X AXIS TO BUTT LINE 2 IN THE GENERAL COMMENTS; [09] VERIFIED CORRECTIVE ACTION ITEMS 6; 7 & 8. TASK IS COMPLETE.