SDR CALA2026081318545

Service difficulty report · Floorbeam · Boeing 737824

Difficulty date: July 28, 2026
Submitted: August 13, 2026
Operation: Air carrier
Aircraft: N77539
Make and model: Boeing 737824
Aircraft serial: 63642
Aircraft time: 27,357 hours, 10,366 cycles
Engine: Cfmint CFM567B27
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 147A550429
Condition: Corroded
Location: Zone 200
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 THE TEE ANGLE AND FITTING AT BS 947, LBL 18. REMOVED DAMAGE, HFEC OPEN HOLES & CUT AREA, ROTO PEENED, NO DEFECTS NOTED. FABRICATED & LOCATED REPAIR PARTS, INSTALLED AND RESTORED COATINGS IAW SRM 53-70-51-2R-5 & DWG 147A5650, REV A. THIS IS A CAT 'A' REPAIR. NO FURTHER ACTION REQ.