Service difficulty report · Strap · Boeing 7377H4

Difficulty date
April 21, 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
Strap
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 - STRAP HAS CORROSION BS 1016 LBL 3; BS 1016+9.5 RBL 3; BS 1016+11 RBL 17.5 ( MARKED)<[01] CORROSION AT BS 1016+9.5 RBL 3 WILL BE ADDRESSED ON FAULT# TTG8Q00KP6BQ AND CORROSION AT BS 1016+11 RBL 17.5 WILL BE ADDRESSED ON FAULT# TTG8Q00KP4L3;[02] CORROSION ON THE STRAP AT BS1016 LBL 3 FOUND TO BE OUT OF LIMITS DUE TO NO SRM ALLOWABLE DAMAGE. THE STRUCTURAL ITEM WILL BE REPAIRED BY REPLACEMENT IAW SRM 51-10-02.;[03] REMOVED TRAP BETWEEN BS1016-BS1022 LBL 3 IAW SRM 51-40-02;[04] VERIFIED CORRECTIVE ACTIONS 1-3.;[05] LOCATED AND DRILLED NEW AFT PASSENGER COMPARTMENT FLOOR STRUCTURE STRAP P/N 147A5620-3 AT BS 1016 LBL 3; BS 1016+9.5 RBL 3; BS 1016+11 RBL 17.5 WL 208 IAW SRM 51-40-05-0G-0 AND DWG# 147A5600 REV-B;[06] VERIFIED CORRECTIVE ACTION 5;[07] OK TO INSTALL;[08] OK TO INSTALL GIVEN;[09] INSTALLED TRAP BETWEEN BS1016-BS1022 LBL 3 IAW SRM 51-40-02 AND IAW DWG#147A5600;[10] VERIFIED CORRECTIVE ACTION STEP 9.;[11] COMPLETE.;[12] VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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