Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
June 7, 2023
Submitted
July 12, 2023
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
38,123 hours, 23,431 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Cracked
Location
Zn 200 Fus Top
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

CRACKED INTERCOSTAL AT FWD CABIN BS275 BL0 WL208. BS- 284 BL-0<[01] REMOVED INTERCOSTAL FROM BS277-BS294 AT BL0 WL 208 IAW SRM 51-40-02;[02] DAMAGE FOUND AT FWD CABIN INTERCOSTAL BS 284; BL-0; WL 208 FOUND TO BE OUT OF LIMIT IAW SRM 53-1-51-1A-1 DET.4B(1A); FIG 105-N;[03] LOCATED AND DRILLED NEW INTERCOSTAL P/N 141A5410-3; LOT#240019 AT BS 277 TO BS 294 BL 0 WL 208 IAW SRM 51-40-05-0G-0 AND DWG# 141A5400.OK TO INSTALL;[04] VERIFIED STEPS #1; #2;AND#3. OK TO INSTALL;[05] INSTALLED NEW INTERCOSTAL AT BS 277 TO BS 294;BL 0; WL 208 IAW SRM 51-40-02-0G-0 AND DWG# 141A5400;[06] VERIFIED STEP #5;[07] VERIFIED STEP #5

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