Service difficulty report · Threshold · Boeing 7377H4

Difficulty date
June 23, 2022
Submitted
August 11, 2022
Operation
Air carrier
Aircraft
N951WN
Make and model
Boeing 7377H4
Aircraft serial
36665
Aircraft time
39,132 hours, 23,683 cycles
Part
Threshold
Condition
Corroded
Location
Aft Cargo Bay
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 AFT CARGO BAY THRESHOLD AT RBL 23 BS 807+1; RBL 23 BS 807+3; RBL 23 BS 807+4; RBL 23 BS 807+11; RBL 26 BS 807+4; RBL 26 BS 807+6; RBL 26 BS 807+12; RBL 26 BS 807+18. / [01] SRM 53-60-15-1A-1 IS APPLICABLE FOR THIS;[02] BLENDED CORROSION ON AFT CARGO BAY TRESHOLD AT RBL 23 ; WORK AREA BS 793+19 ; L 1.0' X W 1.5' X D 0.010' ; BS 807+1 ; L1.0' X W 1.0' X D 0.007' ; BS 807+3 ; L 1.0' X W 1.0' X D 0.010' ; BS 807+4 ; L 1.0' X W 1.0' X D 0.006' ; BS 807+11 ; L 1.5' X W 1.0' X D 0.015' ; 807+4; L 1.0' X W 1.0' X D 0.008' ; BS 807+6; L 1.5' X W 1.0' X D 0.008' ; BS 807+12; L 1.5' X W 1.0' X D 0.010' ; 807+18; L 2.0' X W 1.0' X D 0.009' ; FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 ; STEP 4G ; USE DEPTH GAUGE; ID:ATS401; S/N:UNKNOWN; DUE: 10/2022;[03] VERIFIED CORRECTIVE ACTION ITEM 1-2.;[04] RECEIVED NEW WEB FROM STORES REF PO 874099.<BR>LOCATED; DRILLED; COUNTERSUNK HOLES; INSTALLED NUTPLATES ON NEW WEB IAW SRM 51-40-05; SRM 51-40-02; SRM 51-40-05 AND DWG 146A8340.;[05] VERIFIED CORRECTIVE ACTIONS STEP 4.;[06] FAULT TTG8Q00D6D3S COMPLETED.;[07] VERIFIED STEP 6.;[08] MEASUREMENTS VERIFIED.;[09] CERTIFY.

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