Service difficulty report · Threshold · Boeing 73773V

Difficulty date
July 21, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N7839A
Make and model
Boeing 73773V
Aircraft serial
30243
Aircraft time
63,332 hours, 39,016 cycles
Part
Threshold
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 DOOR SUB THRESHOLD HAS CORROSION AT BS 460+19; 440+16; RBL 28; WL 156<[01] IDENTIFICATION SRM 53-30-15-01-1 AND ALLOWABLE DAMAGE SRM 53-30-15-1A-1 ARE APPLICABLE.;[02] EVALUATED CORROSION ON FWD CARGO BAY THRESHOLD AT RBL 28 BS 460+19 L=.9' W=.8' D=.007'.ORIGINAL TICKNESS IS .056' REMAINING TICKNESS .049' FOUND TO BE OUT OF LIMITS. PER SRM 53-30-15-1A-1 STEPS 4.G.(2) FIGURE 103 DETAIL D. DEPTH GAUGE USED ID: ATS1225 SN: UNKNOWN DUE: 08/2023.;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2.<BR>VERIFIED PARTIAL STEPS 1 AND 2.;[04] UPDATED LINE 2 OF MEASUREMENT FIELD.;[05] TASK CARD COMPLETE.

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