Service difficulty report · Crease Beam · Boeing 75733N

Difficulty date
April 11, 2020
Submitted
April 17, 2020
Operation
Air carrier
Aircraft
N78866
Make and model
Boeing 75733N
Aircraft serial
32591
Aircraft time
58,477 hours, 17,308 cycles
Part
Crease Beam
Part number
143N8328653
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
V
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

(B757-53-3-0557) CREASE BEAM INNER CHORD HAS CORROSION ON UPPER SURFACE,-LEADING UNDER DRAIN PAN AT L-2 LWR SILL, STA 730-740. R EF ST-SAA NR 0091960. FOUND LH CREASE BEAM INNER CHORD AT STA 660 TO 760 OUT OF LIMITS IAW B757-3 SRM 53-30-15-A1 - FIG 101 L=8 W=1.100 D=0.023. REMOVE D AND INSTALLED NEW LH CREASE BEAM INNER CHORD AT STA 660 TO 760 IAW B757-3 SRM 51-40-02 AND DWG 143N8322 PN 143N8328U53. WORK A CCOMPLISHED BY V919728, INSPECTED BY V919675. INSPECTION COMPLETED AND ACCEPTED BY ST-ENG INSP V919675.

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