SDR AWXA0000034

Service difficulty report · Floorbeam · Boeing 737277

Difficulty date: January 26, 2000
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N189AW
Make and model: Boeing 737277
Aircraft serial: 22656
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 65C34537
Condition: Cracked
Location: Bs 700 - 727
Stage of operation: IN
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

SUSPECTED CRACKS MIGRATING FROM FASTENERS ON VERTICAL WEB COMMON TO LOWER CHORD AT MAIN CABIN RT FLOORBEAM BS700-727 RBL 25. HFEC INSP IAW B737 NTM PT 6 51-00-00 FIG 23 REVEALED 8 CRACKS OF DIFFERENT LENGTHS. REMOVED DAMAGED WEB PER 737 SRM 51-40-1. FABRICATED DOUBLER FRM (7075 T-6 .050, R665195) AND FILLER FRM (7075 T-6 .040 R699649) ALODINED AND PRIMED PER 737 SRM 51-10-2. INSTALLED DOUBLER/FILLER IAW 737 SRM 51-40-2 FIG 7.