Service difficulty report · Keelbeam · Boeing 7272Q9

Difficulty date
April 9, 2005
Submitted
May 22, 2005
Operation
Air carrier
Aircraft
N740DH
Make and model
Boeing 7272Q9
Aircraft serial
21930
Aircraft time
46,106 hours, 37,206 cycles
Part
Keelbeam
Condition
Cracked
Location
Fuselage
Part time
46,106 hours, 37,206 cycles
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

REMOVED FASTENERS AS REQ AND PRIMED THE UPPER FLANGE OF THE KEELBEAM CHORD PER S/B 727-53-208 REV 1 FIG 3 DETAIL 2 AT LEFT SIDE BS 870. FABBED REPAIR DOUBLER FROM 15-5 PH .071 HEAT TREATED TO 170 TO 190 KSI PO NR 315722 DIM 8.625 BY 3.875 INCHES HFEC INSPECTED UPPER FLANGE OF THE KEELBEAM TRIM WITH NO CRACKS NOTED IAW B727 NDT MANUAL PT 6 51-00-00 FIG 23. TREATED AND PRIMED DOUBLER AND BARE METAL AT KEELBEAM LOWER CHORD ANGLE LT SIDE BS 870 IAW S/B 727-53-0208 REV 1 FIG 3 DETAIL 2.

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