Service difficulty report · Crease Beam · Boeing 75723A

Difficulty date
October 13, 2009
Submitted
October 13, 2009
Operation
Air carrier
Aircraft
N921FD
Make and model
Boeing 75723A
Aircraft serial
24924
Aircraft time
68,004 hours, 21,149 cycles
Part
Crease Beam
Part number
BAC1515553
Condition
Corroded
Location
Bs 1540-1620
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

LT CREASE BEAM CORRODED AT UPPER AND LWR SURFACE, BS 1540-BS1620 (OUT OF LIMITS). REMOVED CORROSION IAW SRM 51-10-02. ORIG MATERIAL THICKNESS; .070", AFTER REWORK; .059". FOUND TO BE OUT OF LIMITS IAW SRM 53-60-13, FIG 101. REMOVED LH CREASE BEAM, BS 1370-1640, LBL 62, IAW SRM 51-40-02. RECEIVED NEW CREASE BEAM BAC 1515-553, ON MAE BATCH NR 0001710353. LOCATED AND DRILLED NEW CREASE BEAM IAW SRM 51-40-05. TREATED AND PRIMED NEW CREASE BEAM IAW SRM 51-20-01. APPLIED TOP COAT TO NEW CREASE BEAM IAW SRM 51-21-10-377. INSTALLED NEW CREASE BEAM AT BS 1370-1640, LBL 62, IAW SRM 51-40-02. THIS REPAIR IS CLASSIFIED AS A CAT. "A" MAJOR REPAIR.

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