Service difficulty report · Intercostal · Boeing 7472D7B

Difficulty date
July 2, 2010
Submitted
July 6, 2010
Operation
Air carrier
Aircraft
N523MC
Make and model
Boeing 7472D7B
Aircraft serial
21782
Aircraft time
100,704 hours, 20,573 cycles
Part
Intercostal
Condition
Damaged
Location
Bs 1980
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

DURING C-CHECK, AN INTERCOSTAL LOCATED COMMON TO THE BULK CARGO FLOOR HAD DAMAGE THAT IS LISTED AS FOLLOWS: THE INTERCOSTAL AT BS1980, RBL30 WAS CRACKED SEE FIGURE 1, SHEET 2, ITEM 18 AS DOCUMENTED ON NRC518. (THE INTERCOSTAL AT BL30 IS MADE FROM BAC1517-1671, 7075-T6 EXTRUSION IAW SRM 53-10-23, FIG 5, SHEET 11, ITEM 18, FIG 1. THE REPAIR PARTS WERE AN ANGLE AND FILLER MADE FROM 0.040 7075-T6 AND INSTALLED WITH BACB30MY6K HI-LOKS AS DOCUMENTED ON NRC518. FIG 2. THE SUBJECT REPAIR IS PERMANENT AND DOES NOT AFFECT THE REPAIR ASSESSMENT PROGRAM IAW FAR 121.1109, THEREFORE NO SUPPLEMENTAL INSPECTIONS ARE REQUIRED.)

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