Service difficulty report · Frame · Boeing 7377H4

Difficulty date
March 15, 2023
Submitted
April 24, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Frame
Condition
Cracked
Location
Zn 200 Fus Top
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

CRACK ON STA 312 FRAME INNER RADIUS ABOVE L1 DOOR CUT OUT. (MARKED)<[01] VERIFIED APPLICABILITY OF SRM 53-10-15-1A-1 ALLOWABLE DAMAGE 1 - FORWARD ENTRY AND AIRSTAIR DOOR SURROUND STRUCTURE;[02] ACCOMPLISHED EVALUATION ON STA312 FRAME INNER RADIUS ABOVE L1 DOOR CUTOUT S-5L LBL33 WL295 AND FOUND TO BE OUT OF LIMITS IAW SRM 53-10-15-1A-1 PART 4.B FIG.208; L=0.257'' TOOL USED ID: ATS2739 S/N: A22004232 DUE DATE: 11/2023.;[03] VERIFIED CORRECTIVE ACTION 1; 2 AND MEASUREMENT TABLE;[04] HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND. TOOL N500 IS000680 DUE 04/30/2023. SEE TTG8Q00K9A6X;[05] ACCOMPLISHED PERMANENT REPAIR ON STA-312 FRAME INNER RADIUS ABOVE L1 DOOR CUTOUT IAW ENGINEERING AUTHORIZATION M-22-153-01244; REFER TO CUSTOMER#TTG8Q00K9A6X.;[06] VERIFIED CORRECTIVE ACTION 5;[07] VERIFIED STEPS COMPLETE

More about the Boeing 737-7H4