Service difficulty report · Threshold · Boeing 7377CT

Difficulty date
October 13, 2022
Submitted
November 17, 2022
Operation
Air carrier
Aircraft
N569WN
Make and model
Boeing 7377CT
Aircraft serial
33656
Aircraft time
66,340 hours, 34,395 cycles
Part
Threshold
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 AFT CARGO BAY THRESHOLD AT RBL 21 BS 787+8; RBL 23 BS 787+9; RBL 27 BS 787+13; RBL 27 BS 807+2; RBL 27 BS 807+4; RBL 27 BS 807+6; RBL 27 BS 807+9; RBL 27 BS 807+12. / [01] VERIFIED APPLICABILITY FOR IDENTIFICATION IAW SRM 53-60-15-01-1 AND SRM 53-60-15-1A-1 FOR ALLOWABLE DAMAGE;[02] CORRECTION STEP 2 RBL 23 CORRECTION STEP 3 TO 8 RBL 27 REMOVED CORROSION ON AFT CARGO BAY THRESHOLD AT RBL 27 BS 807+12 IAW SRM 51-10-02 EVALUATED DAMAGE MEASURES L= 1.0' X W=0.600' D=0.013' REMAINING THICKNESS 0.032' ORIGINAL. THICKNESS 0.045'<BR>FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 A.D. USED TOOL: ID:ATS2473 S/N: UNKNOWN DUE DATE: 08/2023;[03] VERIFIED CORRECTIVE ACTION #2;[04] REJECTION: MEASUREMENT TABLE REPAIR TYPE INCORRECT;[05] UPDATED MEASUREMENTS;[06] RECIVED NEW THRESHOLD ITEM 146A8123-25LOT 1507702-1 LOCATED AND DRILLED NEW THRESHOLD AT BS 787 TO 847RBL 27; IAW 737-700 SRM 51-40-05-0G-0 DWG 146A8340.-;[07] VERIFIED ITEM 6 CORRECTIVE ACTIONS.;[08] VERIFIED CORRECTIVE ACTION ITEMS AND MEASUREMENT FIELDS; CARD COMPLETE.

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