SDR DHL2007748024

Service difficulty report · Keelbeam · Boeing 727225

Difficulty date: October 18, 2007
Submitted: February 18, 2008
Operation: Air carrier
Aircraft: N748DH
Make and model: Boeing 727225
Aircraft serial: 22440
Aircraft time: 46,617 hours, 27,939 cycles
System (JASC): 5314 · Fuselage Main, Keel
Part: Keelbeam
Condition: Cracked
Location: Bs 870
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

RAM KEEL BEAM LOWER CHORD CRACKED BS 870. TRIMMED CRACKED AREA OF KEEL BEAM. FABRICATED AND INSTALLED REPAIR DOUBLER IAW SB 727-53-0208 REV 1 MATERIAL USED 0.071" 15-5PH STEEL. HEAT TREATED TO 170-190 KSI PER BRADDOCK METAL SPECS PO NR 7307279 8.75" BY 4" CADMIUM PLATED DOUBLER IAW BOEING SOPM 20-42-01 AND FASI FORM FAS0036 REV 4 PO NR FOR DOUBLER 6522231. TREATED AND PRIMED PARTS AND AREA IAW B-727 SRM 51-10-2.