Service difficulty report · Threshold · Boeing 73776Q

Difficulty date
January 11, 2023
Submitted
February 16, 2023
Operation
Air carrier
Aircraft
N565WN
Make and model
Boeing 73776Q
Aircraft serial
30282
Aircraft time
56,383 hours, 37,305 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 FWD CARGO BAY THRESHOLD AT RBL 28 BS 440+10; BS 440+13; BS 440+17; BS 440+18; BS 440+19; BS 460; BS 460+2; BS 460+4.<[01] IDENTIFICATION SRM 53-30-15-01-1 AND ALLOWABLE DAMAGE SRM 53-30-15-1A-1 ARE APPLICABLE. EVALUATED CORROSION ON FWD CARGO BAY THRESHOLD AT RBL 28 BS 440+10 L=1.4' W=.5' D=.011'. FOUND TO BE OUT OF LIMITS. ORIGINAL THICKNESS .045' REMAINING THICKNESS .034' PER SRM 53-30-15-1A-1 STEPS 4.G.(2) FIGURE 103 DETAIL D. DEPTH GAUGE USED ID: ATS400 SN: UNKNOWN DUE: 09/2023.;[02] VERIFIED CORRECTIVE ACTION 1 AND STEPS 1-7.;[03] THIS JOB CARD WAS BE ACCOMPLISHED ON CUSTOMER CARD [TTG8Q00H707T].;[04] VERIFIED CORRECTIVE ACTION #3 AND MEASUREMENT FIELD;[05] NEW PART WILL BE INSTALLED WITH CUSTOMER CARD # TTG8Q004B87Y;[06] VERIFIED CORRECTIVE ACTION #5

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