Service difficulty report · Strap · Boeing 7377H4

Difficulty date
April 27, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N961WN
Make and model
Boeing 7377H4
Aircraft serial
36962
Aircraft time
37,902 hours, 23,158 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

CORROSION ON PASSENGER CABIN FLOOR STRAP AT RBL 18 BS 1016+12 WL 208.<[01] REMOVED CORROSION ON FLOOR STRAP IAW SRM 51-10-02-0G-0; MEASURES L=1.020'' X W=0.825'' ORIGINAL THICKNESS=0.050'' PER DWG# 147A5744; TOOL USED CALIPER ID: ATS2739 S/N:A22004232 DUE DATE:11/2023;[02] NDI UT VERIFICATION REQUIRED.;[03] VERIFIED CORRECTIVE ACTION 1;[04] UT INSPECTED BLEND AREA PER NDTM PT4 51-00-00 PROCEDURE 2; LOWEST READING WAS .047'<BR>EQUIP ID ATS2342 DUE 07/2023;[05] CORROSION ON PASSENGER CABIN FLOOR STRAP AT RBL 18 BS 1016+12 WL 208 FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE LIMIT FOUND FOR THIS PART AND IT IS REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02-0G-0 . REMOVED THE DAMAGED FLOOR STRAP IAW SRM 51-40-02 .;[06] FABRICATED LOCATED AND DRILLED NEW PASSENGER CABIN FLOOR STRAP AT RBL 18 BS 1016 WL 208 IAW SRM 51-40-05 AND DWG # 147A5744 ; OK TO TREAT AND PRIME;[07] VERIFIED CORRECTIVE ACTION ITEM 5-6. OK TO TREAT AND PRIME.;[08] APPLIED A CHEMICAL CONVERSION COATING AND PRIMER TO THE NEW STRAP IAW SRM 51-20-01 AND SOPM 20-41-02 ; OK TO INSTALL;[09] VERIFIED CORRECTIVE ACTION ITEM 8; OK TO INSTALL.;[10] INSTALLED NEW PASSENGER CABIN FLOOR STRAP AT RBL 18 BS 1016 WL 208 IAW SRM 51-40-02 AND DWG # 147A5730;[11] VERIFIED CORRECTION ACTION ITEM 10.;[12] VERIFIED CORRECTION ACTION ITEM 10 AND MEASUREMENT TABLE CARD COMPLETE.

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