Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
September 24, 2022
Submitted
November 9, 2022
Operation
Air carrier
Aircraft
N201LV
Make and model
Boeing 7377H4
Aircraft serial
29854
Aircraft time
59,586 hours, 35,374 cycles
Part
Intercostal
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 AT STA 312+4 AND 312+10; RBL 31; WL 208. / [01] VERIFIED APPLICABILITY OF SRM 53-30-53-01-2 FOR IDENTIFICATION AND SRM 53-30-53-1A-1 FOR ALLOWABLE LIMIT;[02] DAMAGE FOUND AT INTERCOSTAL BS 312+4 ; RBL 31; WL 208 P/N 141A5410-12 1' LONG; FOUND TO BE OUT OF LIMIT IAW SRM 53-30-53-1A-1 DET.4A(1); FIG 103;[03] VERIFIED CORRECTIVE ACTIONS 1; #2.;[04] REMOVED FWD CABIN INTERCOSTAL BS 312 TO BS 328 RBL 31 IAW SRM 51-40-02 ; LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05 AND DWG # 141A5400 ; OK TO INSTALL;[05] INSTALLED NEW FWD CABIN INTERCOSTAL BS 312 TO BS 328 RBL 31 IAW SRM 51-40-02 AND DWG # 141A5400 .;[06] INSPECTED ACTION 4; OK TO INSTALL GIVEN PRIOR TO ACTION 5;[07] VERIFIED CORRECTIVE ACTION 5;;[08] VERIFIED MEASUREMENT TABLE

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