SDR ASAA2022123041603

Service difficulty report · Support · Boeing 737990ER

Difficulty date: December 30, 2022
Submitted: January 24, 2023
Operation: Air carrier
Aircraft: N273AK
Make and model: Boeing 737990ER
Aircraft serial: 61554
Aircraft time: 18,901 hours, 6,144 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Support
Part number: 146A750139
Condition: Corroded
Location: Bs 801
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

AFT PIT DLOOR PANEL SUPPORT STRINGER UPPER SURFACE HAS CORROSION AT STA 801, RBL, 14 (MARKED). GROUNDED - YES. REMOVED CORROSION IAW B737-900ER SRM 53-00-53 AND FOUND TO BE OUT OF LIMITS. FABRICATED AND INSTALLED REPAIR PARTS IAW B737-900ER SRM 53-00-53-2R-3 AND EA 900-ER-53EA-25179 PRELIMINARY. ORIG MAT = .070,MAT REMOVED = .014, MAT REMAINING = .056 TOOL# T8224K DUE 17OCT2023 PO:1014839.1, 1051889.1, 1035942.1.