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SDR CALA2025091108778

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Service difficulty report · Floor Support · Boeing 737824

FAA SDR system

Difficulty date
September 9, 2025
Submitted
September 11, 2025
Operation
Air carrier
Aircraft
N33209
Make and model
Boeing 737824
Aircraft serial
30581
Aircraft time
76,364 hours, 28,565 cycles
System (JASC)
5320 · Fuselage Miscellaneous Structure
Part
Floor Support
Part number
147A5762U13
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

MAIN CABIN INTERCOSTAL BS 950 TO 967, RBL 60 CORRODED ON UPPER SURFACE, EVALUATED CORROSION ON INTERCOSTAL BELOW BS 950 TO 967, RBL 60 ORIGINAL THICKNESS .130" CORROSION DEPTH .128" REMAINING MAT .002, FOUND TO BE OUT LIMITS IAW DWG 147A5762 REV B, SRM 53-70-51. REMOVED AND INSTALLED NEW INTERCOSTAL BS 950 TO 962, RLB 60.