Service difficulty report · Channel · Boeing 7377H4

Difficulty date
March 14, 2022
Submitted
April 8, 2022
Operation
Air carrier
Aircraft
N240WN
Make and model
Boeing 7377H4
Aircraft serial
32503
Aircraft time
53,442 hours, 31,881 cycles
Part
Channel
Condition
Corroded
Location
Aft Cargo
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

AFT CARGO COMP BETWEEN STA 767 AND STA 847 LBL 21' ZEE CHANNEL UPPER SURFACE CORROSION / [01] REMOVED CORROSION AT AFT CARGO COMP BETWEEN STA767 AND STA 847 LBL 21' Z CHANNEL AS PER B 737 AMM-51-00-53-201-NG-01.;[02] VERIFIED STEP 1;[03] PERFOREMED UT THICKNESS INSP. ON REWORKED AREA @ AFT CARGO COMP BETWEEN STA 767 AND STA 847 LBL 21? Z-CHANNEL UPPER SURFACE IAW B737 NDT PART 4 51-00-00 PROC. 3. MIN THICKNESS .026'; EQUIP: OLYMPUS 27MG CAL DUE: 4/22;[04] ORIGINAL-MAT .040';MAT-REMOVED.014';MAT-REMAINING.026'FOUND OUT OF LIMITS FROM STA 767 TO STA 847 REF B737-700 SRM 53-00-53-1A-2 FIG 103 WORK ACCOMPLISHED BY MARIO MARTINEZ #21787;[05] VERIFIED STEP 4. OK TO TREAT AND PRIME;[06] EDIT STEP 5. VERIFICATION OF STEP 4 ONLY. CANCEL OK TO TREAT AND PRIME.;[07] STARTED FABRICATION OF SPLICE AND PART OF THE SIDEPLATE THAT HAS CORROSION DAMAGE THAT IS OUT OF LIMITS REF B 737-700 SRM 53-00-53-2R-6 UP TO STEP 4.J. WORK WAS ACCOMPLISHED BY TECHNICIANS MARIO MARTINEZ EMPL # 21787 AND JESUS HERNANDEZ EMPL # 1709;[08] VERIFIED STEP 7;[09] COMPLETED FABRICATION OF SPLICE REPAIR AND ZEE CHANNEL FROM STA 767 TO STA 847;LBL 21'AT AFT CARGO COMP REF B737-700 SRM 53-00-53-2R-6 AND DWG #146A7502;[10] VERIFIE STEP 9<BR>OK TO INSTALL SPLICE REPAIR;[11] INSTALLED SPLICE REPAIR ON ZEE CHANNEL AT AFT CARGO COMP BETWEEN STA 767 AND STA 847 LBL 21' REF B737-700 SRM 51-40-02-0G-0;[12] MEASUREMENTS INPUT ONLY;[13] VERIFIED STEPS 11 AND 12

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