SDR ASAA2018113027139

Service difficulty report · Intercostal · Boeing 737790

Difficulty date: November 12, 2018
Submitted: November 30, 2018
Operation: Air carrier
Aircraft: N618AS
Make and model: Boeing 737790
Aircraft serial: 30543
Aircraft time: 59,712 hours, 28,038 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 148A226125
Condition: Corroded
Location: Bs 1028-1032
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, AFT WET AREA, AFT PRESSURE BULKHEAD LOWER INTERCOSTAL AT STA 1028-STA 1032, RBL 17-RBL 27, WL 210 UPPER SURFACE CORRODED. GROUNDED - YES. EVALUATED INTERCOSTAL ON THE AFT PRESSURE BULKHEAD AT STA 1028-STA 1032, RBL 17-RBL27, FOUND TO BE OUT OF LIMITS IAW B737-700 SRM 53-80-08-1A-1 FIGURE 103, DETAIL D. REMOVED AND REPLACED INTERCOSTAL, PART# 148A2261-25 IAW B737-700 SRM 51-40-02 AND BOEING DRAWING 148A0922. REV-SHEET 11-12. DOT X076 REMOVED.