Service difficulty report · Panel · Boeing 7377H4

Difficulty date
January 5, 2023
Submitted
February 7, 2023
Operation
Air carrier
Aircraft
N209WN
Make and model
Boeing 7377H4
Aircraft serial
32484
Aircraft time
59,684 hours, 35,490 cycles
Part
Panel
Part number
NOTREPORTED
Part serial
NOTREPORTED
Condition
Corroded
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

CORROSION AFT WET AREA MOPSIL BS947+1- BS986+5 LBL 55<[01] VERIFIED THE APPLICABILITY OF SRM 53-70-15-0I-1 AND SRM 53-70-15-1A-1;[02] REMOVED CORROSION ON AFT WET AREA MOP SILL BS 947+1 - 986 + 5 LBL 55 WL 208 ON MULTIPLE AREAS OF 1.0'X1.0' IAW SRM 51-10-02 ;. ORIGINAL THICKNESS IS 0.080' IAW SRM 53-70-15-0I-1;[03] VERIFIED CORRECTIVE ACTION STEPS 1 AND 2.;[04] UT INSPECTED BLENDED AREA IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2.<BR>REMAINING MATERIAL THICKNESS IS 0.060' ADJACENT TO 0.080'.<BR>EQUIP USED:<BR>-EPOCH 650 ID: ATS2031 CAL DUE: 03/23;[05] ORIGINAL MATERIAL THICKNESS OF L/H AFT MOPSIL 0.080' REMAINING THICKNESS 0.060' FOUND TO BE OUT OF LIMIT IAW SRM 53-70-15-1A-1; DET.4D(2A); FIG 103-D;[06] VERIFIED CORRECTIVE ACTION #5.;[07] REMOVED AFT LH MOP SILL BS 887+8 TO BS 1016 LBL 55 IAW SRM 51-40-02-0G-0;[08] LOCATED AND DRILLED NEW MOP SILL P/N:147A8540-7 IAW SRM 51-40-05-0G-0 AND DRAWING#147A8501;[09] VERIFIED CORRECTIVE ACTION #7 AND 8;[10] OK TO INSTALL NEW AFT WET AREA MOP SILL L/H SIDE;[11] VERIFIED CORRECTIVE ACTION STEP 10. VERIFIED OK TO INSTALL.;[12] INSTALLED AED MOPSILL IAW SRM 51-40-02; IAW DWG#147A8501 AND IAW DGW#147A0004;[13] VERIFIED CORRECTIVE ACTION ITEM 12.;[14] UPDATED THE MEASUREMENTS TABLE...JOB COMPLETED;[15] VERIFIED MEASUREMENT TABLE

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