Service difficulty report · Web · Boeing 7378H4

Difficulty date
December 21, 2023
Submitted
January 25, 2024
Operation
Air carrier
Aircraft
N8559Q
Make and model
Boeing 7378H4
Aircraft serial
63584
Aircraft time
19,801 hours, 9,988 cycles
Part
Web
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

AFT CARGO THRESHOLD WEB BELOW MAIN SCUFF PLATE HAS SURFACE CORROSION FROM BS787+6 -847<[01] REMOVED CORROSION IAW SRM 51-10-02; MATERIAL REMOVED IS 0.015; FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1.;[02] REMOVED WEB PER SRM 51-40-02;[03] DRILLED AND COUNTERSUNK NEW WEB PER SRM 51-40-05 AND SRM 51-40-08;[04] VERIFIED. DRILLED AND COUNTERSUNK NEW WEB PER SRM 51-40-05 AND SRM 51-40-08;[05] INSTALLED FASTENER ON NUT PLATES PER SRM 51-40-02. NEED OK TO INSTALL THRESHOLD WEB.;[06] OK TO INSTALL WEB;[07] INSTALLED NEW WEB FASTENERS PER SRM 51-40-02.;[08] VERIFIED INSTALLATION OF NEW WEB

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