SDR ASAA2025051058057

Service difficulty report · Floor Support · Boeing 737990ER

Difficulty date: May 10, 2025
Submitted: May 20, 2025
Operation: Air carrier
Aircraft: N260AK
Make and model: Boeing 737990ER
Aircraft serial: 36349
Aircraft time: 28,668 hours, 9,219 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Part number: 143A7501
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

IN FWD CARGO PIT, FIXED SUB-FLOOR SUPPORT HAS CORROSION IN AND AROUND BOLT HOLE, AT STA 500H LBL 24. MARKED IN RED. GROUNDED - YES. REMOVED CORROSION, ORIGNAL THICKNESS .040, MATERIAL REMOVED 0.001, REMAINING MATERIAL .039 FOUND TO BE WITHIN LIMITS IAW B737-900ER SRM 53-00-53-1A-2 TOOLING T8224B DUE:02-DEC-25, ALODINED AND PRIMER WERE APPLIED TO AREA IAW B737-NG SRM 51-20-01-OG-0.