Service difficulty report · Intercostal · Boeing 737

Difficulty date
August 12, 2022
Submitted
September 7, 2022
Operation
Air carrier
Aircraft
N8648A
Make and model
Boeing 737
Aircraft serial
42531
Aircraft time
27,511 hours, 12,724 cycles
Part
Intercostal
Part number
147A56603
Condition
Corroded
Location
Cabin Floor
Stage of operation
IN
How discovered
9
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

CORROSION ON FLOOR SUPPORT BS 947+1 LBL26 WL 208 / [01] VERIFIED NO SRM APPLICABILITY FOR THIS PART.;[02] VERIFIED THAT THERE IS NO SRM APPLICABLE FOR THIS FLOOR SUPPORT.;[03] VERIFIED CORRECTIVE ACTION #1;[04] REMOVED CORROSION ON FLOOR SUPPORT. ORIGINAL THICKNESS 0.200'. AMOUNT OF CORROSION REMOVED 0.035'. REMAINING THICKNESS 0.165' . OUT OF LIMITS PER NO SRM ALLOWABLE DAMAGE FOR THIS FLOOR SUPPORT.;[05] VERIFIED CORRECTIVE ACTION #4;[06] LOCATED AND DRILLED HOLES IN NEW INTERCOSTAL IAW SRM 51-40-05 AND DWG 147A5650 ID: 0013 AND ATTACHED ADHESIVELY BONDED NUT PLATES PER SRM 51-40-10-2R-0. REQUESTING OK TO INSTALL.;[07] VERIFIED CORRECTIVE ACTION #6<BR>MEASUREMENT TABLE VERIFIED;[08] INSTALLED NEW INTERCOSTAL IAW SRM 51-40-02-0G-0 AND DWG 147A5650 ID: 0013 .;[09] INSTALLED INTERCOSTAL AT BS 947+1 LBL26 WL208 IAW SRM51-40-02-0G-0 AND DWG 147A5650;[10] CERTIFIED CORRECTION OF BS947+1 LBL26 WL208 . ADDED;[11] CORRECTIVE 4 ADDED REMOVAL OF INTERCOSTAL AT BS 947+1 LBL26 WL208;[12] CERTIFIED REMOVAL OF INTERCOSTAL AS PART OF CORRECTIVE ACTION 4;[13] VERIFIED INSTALLATION OF INTERCOSTAL AT BS 947+1 LBL26 WL208;[14] VERIFIED INSTALLATION OF INTERCOSTAL AT BS 947+1 LBL26 WL208; CARD COMPLETE