SDR DHL2007751519

Service difficulty report · Keelbeam · Boeing 727264

Difficulty date: March 20, 2007
Submitted: March 20, 2007
Operation: Air carrier
Aircraft: N751DH
Make and model: Boeing 727264
Aircraft serial: 22982
Aircraft time: 34,927 hours, 18,620 cycles
System (JASC): 5314 · Fuselage Main, Keel
Part: Keelbeam
Condition: Cracked
Location: Bs 870-873
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 FWD KEEL BEAM, BS 870, HAS A CRACK BETWEEN TWO FASTENERS. VERIFIED CRACK FROM BS 870 TO BS 873. GAINED ACCESS AS REQ, CUT OUT DAMAGED AREA 1.875" BY 1" PER SB B727-53-0208. FABRICATED REPAIR DOUBLER FROM 15.5 PH STEEL, .071" BY 8.5" BY 3.75", PO NR 6522231 PER SB B727-53-0208. HEAT TREATED DOUBLER TO HRC 40.61, KSI 170 AND CADMIUM PLATED PER SB B727-53-0208, AMS-H-6875A, AMS27591-3D, AND FASI FORM FAS0036 REV 4. INSTALLED DOUBLER PER SB B727-53-0208. RETURNED ARE TO NORMAL.