Service difficulty report · Web · Boeing 7378H4

Difficulty date
April 20, 2024
Submitted
May 23, 2024
Operation
Air carrier
Aircraft
N8573Z
Make and model
Boeing 7378H4
Aircraft serial
64250
Aircraft time
19,244 hours, 9,887 cycles
Part
Web
Part number
UNKNOWN
Condition
Corroded
Location
Bs 440-492
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

FWD CARGO THRESHOLD WEB UPPER SURFACE HAS NUMEROUS AREAS OF CORROSION AT N/P AND FASTNER HOLES. STA 440 - 492 RBL 29-30 WL 156. MRKD<[01] BLENDED CORROSION PER SRM 51-10-02. BLENDED AREA OUT OF LIMITS PER SRM 53-30-15-1A-1;[02] C/W INSP. BLENDED CORROSION PER SRM 51-10-02. BLENDED AREA OUT OF LIMITS PER SRM 53-30-15-1A-1;[03] REMOVED THRESHOLD WEB PER SRM 51-40-02.;[04] DRILLED AND COUNTERSUNK NEW WEB IAW SRM 51-4-05 AND SRM 51-40-08.;[05] INSPECTED WORK ACCOMPLISHED IN C/A #S<BR>3. ROSS RICHARDSON (TECHNICIAN); 03-MAY-2024 00:38 UTC<BR>REMOVED THRESHOLD WEB PER SRM 51-40-02.<BR><BR>4. TEKLU GEBREMARIAM (TECHNICIAN); 03-MAY-2024 08:51 UTC<BR>DRILLED AND COUNTERSUNK NEW WEB IAW SRM 51-4-05 AND SRM 51-40-08.;[06] PRIMED COUNTERSINKS AND NEW HOLES PER AMM 51-21-72. INSTALLED NEW NUT PLATES PER SRM 51-40-02. OK TO INSTALL WEB.;[07] INSPECTED AS REQUIRED. CORRECTIVE ACTION #6. OK TO INSTALL NEW WEB.;[08] INSTALLED NEW WEB PER SRM 51-10-02 AND 51-40-02.;[09] INSPECTED AS REQUIRED. CORRECTIVE ACTION #8

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