Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 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

CORROSION ON FLOOR SUPPORT AT AFT WET AREA BS997 RBL7 WL208. / [01] VERIFIED APPLICABILITY FOR SRM 53-70-51-1A-1.<BR>REMOVED CORROSION ON FLOOR SUPPORT ; RBL7 WL 208 IN A 1.3X1.9' AREA; MAX DEPTH .025'. ORIGINAL THICKNESS IS .080'. FOUND TO BE OUT LIMITS PER SRM 53-70-51-1A-1; MEASURED WITH DIAL DEPTH GAUGE ID: ATS2677.;[02] VERIFIED CORRECTIVE ACTION #1; OUT OF LIMITS;[03] REMOVED INTERCOSTAL AT RBL7 WL208 FROM BS 886;5 TO 1006 PER SRM 51-40-02-0G-0;[04] INTERCOSTAL LOCATION IS RBL7; WL208; FROM BS 986.5 TO 1006.;[05] LOCATED AND DRILLED INTERCOSTAL AT BS 986.5-1006; RBL 7 PER DWG 147A5730 AND SRM 51-40-05. INTERCOSTAL TO BE INSTALLED ON TTG8Q00BLVCP.;[06] VERIFIED CORRECTIVE ACTION ENTRY 5.

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