Service difficulty report · Strap · Boeing 7377H4

Difficulty date
May 12, 2023
Submitted
June 20, 2023
Operation
Air carrier
Aircraft
N429WN
Make and model
Boeing 7377H4
Aircraft serial
33658
Aircraft time
66,602 hours, 39,316 cycles
Part
Strap
Part number
UNKNOWN
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

FORWARD CARGO COMPARTMENT - MULTIPLE AREA OF CORROSION ON TENSION STRAP BS 420 TO BS 480+12 RBL 21.75 (MARKED)<[01] VERIFIED SRM APPLICABILITY FOR IDENTIFICATION AN ALLOWABLE DAMAGE. SRM 53-30-15-0I-1 IDENTIFICATION 1 AND ALLOWBLE DAMAGE SRM 53-30-15-1A-1;[02] REMOVED CORROSION ON TENSION STRAP BS 420 TO BS 480+12 RBL 21.75 PER REF SRM 53-30-15-1A-1 <BR><BR>BLEND OUT EVALUATION ; THE MATERIAL LOST IS MORE THAN 50% .THEREFORE;FOUND TO BE OUT OF LIMITS PER REF SRM 53-30-15-1A-1;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] REMOVED TENSION STRAP BS 420 TO BS 480+12 RBL 21.75 PER REF SRM 51-40-02;[05] RECEIVED NEW TENSION STRAP ON FORWARD CARGO COMPARTMENT FROM BS 420 TO BS 500A RBL 21.75 P/N143A8125-1 PO#921153. LOCATED AND DRILLED IAW SRM 51-40-05 AND DWG 143A8120 ; DWG143A8330;[06] OK TO INSTALL;[07] VERIFIED CORRECTIVE ACTION 6<BR>OK TO INSTALL TENSION STRAP GIVEN;[08] PARTIAL INSTALLTION ON FORWARD CARGO COMPARTMENT OF TENSION STRAP FROM BS 420 TO BS 500A RBL 21.75 IAW SRM 51-40-02 AND DWG143A8120; DWG143A8330;[09] INSTALLED NEW ON FORWARD CARGO COMPARTMENT TENSION STRAP FROM BS 420 TO BS 500A RBL 21.75 IAW SRM 51-40-02 AND DWG 143A8120;DWG 143A8330;[10] VERIFIED CORRECTIVE ACTION 8 AND 9.;[11] VERIFIED MEASUREMENT TABLE

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