Service difficulty report · Frame · Boeing 7377H4

Difficulty date
August 28, 2021
Submitted
September 22, 2021
Operation
Air carrier
Aircraft
N228WN
Make and model
Boeing 7377H4
Aircraft serial
32496
Aircraft time
53,078 hours, 31,709 cycles
Part
Frame
Condition
Cracked
Location
Bs 312
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 FRAME LOCATED BS312 ENTRY DOOR CUT OUT AT PASSENGER CABIN ; 2021-392204 / [01] EVALUATED DAMAGE ON FRAME LOCATED BS312 ENTRY DOOR CUT OUT AT PASSENGER CABIN AND NO FOUND ALLOWABLE DAMAGE LIMITS ON SRM MUST BE REPAIRED MEASURE OF CRACK ARE: L: 0.283 INCH. TOOL USED DIGITAL CALIPER P/N: DIGITAL 150 S/N: AE-412610 DUE DATE: 21-MAY-22; [05] VERIFIED STEP 3 AND 4; [06] PERFORMED TRIM OUT OF DAMAGE PORTION ON REPAIR AREA FRAME LOCATED BS312 BTW S-4L AND S-5L ENTRY DOOR CUT OUT AT PASSENGER CABIN IAW B737-700 SRM 53-10-07-2R-1 REPAIR 1 FIGURE 202 TOOL USED CALIPER P/N: 500-752-20 S/N: B16101265 DUE DATE: 20APR22 RADIUS GAGE P/N: 2204A3 S/N: AE-408657 DUE DATE: 02NOV21; [07] PERFORMED BENT OF REPAIR ANGLE [1] IAW B737-700 SRM 53-10-07-2R-1 REPAIR 1 AND B737-700 SRM 51-30-01 MATERIAL USED ALUMINUM SHEET 7075T0-0.063 PO 2021 129486 TOOL USED RADIUS GAGE P/N: 2204A3 S/N: AE-408657 DUE DATE: 02NOV21; 12] HFEC INSPECTION DONE ON EDGES FRAME CUTOUT LOC. BS 312; FWD ENTRY DOOR CUTOUT IAW NDT MANUAL 51-00-00 PART6; PROCEDURE 23. CRACK INDICATION NOT FOUND. TOOL USED: EDDY CURRENT EQUIPMENT; P/N: NORTEC500D; S/N: N500X1693P030456; CAL DUE DATE:30-NOV-21.;[23] INSTALLED REPAIR REPAIR ANGLE [1] AND FASTENER ON FRAME BS312 BTW S-4L AND S-5L ENTRY DOOR CUT OUT AT PASSENGER CABIN IAW B737-700 SRM 53-10-07-2R-1 REPAIR 1 AND B737-700 SRM 51-40-02;

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