SDR DALA2022100406451

Service difficulty report · Floor Support · Boeing 737

Difficulty date: September 30, 2022
Submitted: October 4, 2022
Operation: Air carrier
Aircraft: N810DN
Make and model: Boeing 737
Aircraft serial: 31922
Aircraft time: 28,948 hours, 10,934 cycles
System (JASC): 5313 · Fuselage Main, Longeron/Stringer
Part: Floor Support
Condition: Corroded
Stage of operation: IN
How discovered: O
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

(LOG 2432020) DURING INSPECTION FOUND CORROSION AROUND UPPER FLANGE OF MACHINED INTERCOSTAL RBL 51.0 BTW STA 947.5 AND STA 967, AFT CABIN PAX. FLOOR SUPPORT AT RBL51 STA 947.5 TO STA 967 WAS REPLACED PER B737-900ER SRM 53-70-51-1A PROCEDURE 1 ALLOWABLE DAMAGE 1, PAR.4.A(2)(A) FIG.103, DETAIL E AND B737 NDT MANUAL PART. 4, 51-00-00 PROCEDURE 3. AND SRM 51-40-02-0G.