SDR ASAA2016090218066

Service difficulty report · Floorbeam · Boeing 737890

Difficulty date: September 2, 2016
Submitted: September 20, 2016
Operation: Air carrier
Aircraft: N563AS
Make and model: Boeing 737890
Aircraft serial: 35180
Aircraft time: 37,707 hours, 11,366 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 141A5504
Condition: Corroded
Location: Fuselage
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

CORROSION ON TOP OF FLOORBEAM AT STA 328, RBL 54. ACFT GROUNDED. REMOVED CORROSION AT RBL 54, ORIGINAL THICKNESS 0.125 IAW DWG 15189-1210, REMAINING THICKNESS 0.094, REMOVED 0.031, BLENDED AREA IS OUT OF ALLOWABLE LIMITS IAW SRM 53-10-51-1A-1, PAR 4, FIG 105. REPAIRED BS 328 UPPER CHORD OF FLOORBEAM IAW SRM 53-10-51-2R-7, REPAIR NR 7.