Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 20, 2022
Submitted
June 15, 2022
Operation
Air carrier
Aircraft
N476WN
Make and model
Boeing 7377H4
Aircraft serial
32475
Aircraft time
60,443 hours, 35,915 cycles
Part
Intercostal
Part number
141A5410U24
Condition
Cracked
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

MAIN CABIN FWD WET AREA INTERCOSTAL BETWEEN STA 344 AND STA 360 RBL 12' CRACKED / [01] REMOVED INTERCOSTAL AT MAIN CABIN STA 344 TO STA 360 PER SRM 51-40-02-0G-0;[02] DRILLED HOLES IN NEW INTERCOSTAL AT MAIN CABIN STA.344 TO STA. 360 IAW B737-700 SRM 51-40-05-OG-O;[03] VERIFIED 1;[04] VERIFIED HOLES'S DRILL NEW INTERCSTAL;[05] OK TO TREAT AND PRIME DRILLED HOLES;[06] TREATED AND PRIMED HOLES IN NEW INTERCOSTAL IAW B737-700 SRM 51-20-01-OG-O AND AMM 51-21-72-370-804.;[07] VERIFIED 6. OK TO INSTALL;[08] INSTALLED NEW INTERCOSTAL AT MAIN CABIN BETWEEN STA 344 TO STA 360 RBL 12 AS PER B737-700 SRM 51-40-02-0G-0 AND DWG # 141A5400;[09] VERIFIED STEP 8

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