Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 2, 2023
Submitted
May 31, 2023
Operation
Air carrier
Aircraft
N285WN
Make and model
Boeing 7377H4
Aircraft serial
32536
Aircraft time
51,630 hours, 31,054 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
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 BS 328-344 LBL 44 WL 208.<[01] CRACKED INTERCOSTAL FOUND TO BE .563' LONG FROM CENTER FASTENER HOLE UPPER FLANGE ORIGINAL THICKNESS .040 FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 FIG 105 (A) REMOVED CRACKED DAMAGED INTERCOSTAL AT BS 328 TO BS 344 LBL 44 WL 208 IAW SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05-0G-0 OK TO INSTALL;[02] VERIFIED CORRECTIVE ACTION #1.<BR>VERIFIED OK TO INSTALL NEW INTERCOSTAL.;[03] INSTALLED NEW INTERCOSTAL AT BS 328 TO BS 344 LBL 44 WL 208 IAW SRM 51-40-02-0G-0 AND BOEING DWG 141A5400;[04] VERIFIED CORRECTIVE ACTION #3.;[05] UPDATED AND COMPLETED MEASUREMENTS TABLE;[06] VERIFIED MEASUREMENTS.

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