Service difficulty report · Intercostal · Boeing 747212B

Difficulty date
February 26, 2008
Submitted
May 2, 2008
Operation
Air carrier
Aircraft
N521UP
Make and model
Boeing 747212B
Aircraft serial
21944
Aircraft time
62,889 hours, 8,989 cycles
Part
Intercostal
Condition
Cracked
Location
L1 Door
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

INSPECTION TYPE:C CABIN LT NR 1 DOOR BEAM INSTL FOUND CRACKED AS MARKED. NEW BEAM INTERCOSTAL FABRICATED USING MATL 7075-0.050" PER DWGABA7096. INTERCOSTAL HEAT TREATED TO T62 PER DPS7.00-1 HARDNESS HRB 78.4 IS ACCEPTABLE PER DPS1.05-3. HOLES PICKED UP ON NEW BEAM PER SRM 51-31-01 V.2R .40 AND REPROTECTED PER SRM 51-21-01 V.2R.40. NEW BEAM INTERCOSTAL INSTALLED PER SRM 51-33-01 AND 51-35-01V.2R.40.

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