SDR ASAA2022100440439

Service difficulty report · Floorbeam · Boeing 737890

Difficulty date: October 4, 2022
Submitted: October 25, 2022
Operation: Air carrier
Aircraft: N569AS
Make and model: Boeing 737890
Aircraft serial: 35184
Aircraft time: 56,215 hours, 16,898 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 147A55067
Condition: Corroded
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

MAIN CABIN AFT WET AREA BS986 FLOORBEAM IS CORRODED AT RBL44 FASTENER HOLE. DOT: L086. GROUNDED - YES. BLENDED OUT CORROSION. ORIGINAL THICKNESS 0.150. REMAINING THICKNESS 0.090, REMOVED 0.060. OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. CUT OUT DAMAGE STA 986.5 RBL50-LBL8 IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 2. FABRICATED REPAIR PARTS AND INSTALLED REPAIR IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 2. REMOVED DOT.