Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 20, 2022
Submitted
June 17, 2022
Operation
Air carrier
Aircraft
N476WN
Make and model
Boeing 7377H4
Aircraft serial
32475
Aircraft time
60,443 hours, 35,915 cycles
Part
Intercostal
Condition
Corroded
Location
Fuselage
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 FLOOR SUPPORT BETWEEN STA 294.5 AND STA 312 LBL 12' CORROSION / [01] REMOVED FASTENERS ON FWD WET AREA FLOOR SUPPORT BETWEEN STA 277 AND STA 294.5 LBL 12 AND ON LEFT ELEVATOR 'EA' AND 'EB' CONTROL CABLE PULLEYS AT (STA 294.5) AS PER B737-700 SRM 51-40-02-0G-0;[02] REMOVED ON FWD WET AREA FLOOR SUPPORT BETWEEN STA 294.5 AND STA 312 LBL 12 AS PER B737-700 SRM 51-40-02-0G-0;[03] LOCATED AND DRILLED HOLES AT NEW FLOOR SUPPORT AS PER B737-700 SRM 51-40-05-0G-0;[04] VERIFIED STEP #3 AND OK TO INSTALL NEW INTERCOASTAL;[05] MIXED SEALANT BMS 5-95 AT 23:00 EST 05/26/2022; SQUEEZE OUT AND FASTENER INSTALLATION VERIFICATION DUE BY 7:00 EST 05/30/2022.;[06] INSTALLED INTERCOSTAL AT FWD WET AREA FLOOR BETWEEN STA 294.5 AND STA 312 LBL 12 AS PER B737-700 SRM 51-40-02-0G-0 AND DWG 141A5600;[07] INSTALLED ALL REMOVED FASTENERS ON FWD WET AREA SUPPORT BETWEEN STA 277 AND STA 294.5 LBL 12 AND ON LEFT ELEVATOR 'EA' AND 'EB' CONTROL CABLE PULLEYS AT (STA 294.5) AS PER B737-700 SRM 51-40-02-0G-0;[08] VERIFIED STEPS 6 AND 7; FASTENER INSTALLATION VERIFIED ON 28MAY2022 3:53 UTC

More about the Boeing 737-7H4