Service difficulty report · Web · Boeing 7377H4

Difficulty date
April 26, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 cycles
Part
Web
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

AFT PASSENGER COMPARTMENT FLOOR STRUCTURE - SHEAR WEB HAS CORROSION BS 1016 RBL 36.<[01] REMOVED CORROSION ON THE SHEAR WEB AT BS 1016 RBL 36 IAW SRM 51-10-02. MAX MATERIAL REMOVED IN AREA OF L=1.3' AND W=0.8' FROM ON ORIGINAL THICHNESS 0.040' PER DWG#1475744; PN#147A5744-16;[02] VERIFIED CORRECTIVE ACTION 1;[03] REQUESTED UT REMAINING THICHNESS OF THE BLENDED AREA;[04] UT INSPECTED BLENDED AREA IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2.<BR>REMAINING MATERIAL THICKNESS IS 0.037' ADJACENT TO 0.040'. <BR>EQUIP USED: <BR>-EPOCH 650 ID: ATS2342 CAL DUE: 07/23;[05] FAULT TTG8Q00KP17R P/N 147A5744-16 SHEAR WEB DAMAGE DISCREPANCY AT BS 1016 RBL 36 IS ALREADY ADDRESSED IN FAULT TTG8Q00KL0CN PER EA#23-153-01399-WIP2 STEP 1;[06] RESOLVED FAUL TTG8Q00KP17R WITH THE RESOLUTION OF 'REFER TO FAULT TTG8Q00KL0CN FOR REPAIR RESOLUTION' AND ' EA-GENERAL' REPAIR REFERENCE IS SELECTED.;[07] VERIFIED CORRECTIVE ACTION 5 AND 6.;[08] VERIFIED MEASUREMENTS.

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