Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
February 10, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N277WN
Make and model
Boeing 7377H4
Aircraft serial
32531
Aircraft time
51,901 hours, 31,206 cycles
Part
Intercostal
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

MAIN CABIN INTERCOSTAL BETWEEN STA 277-294.5 BL 0 CRACKED<[01] REMOVED INTERCOSTAL DAMAGED AT MAIN CABIN STA. 277 TO 294.5 BL '0'. REF. SRM. 51-40-02;[02] LOCATED AND DRILLED NEW MAIN CABIN INTERCOSTAL AT STA 277-294.5 BL0 REF SRM 51-40-05-0G-0;[03] VERIFIED STEP 1;[04] VERIFIED STEP 2. OK TO INSTALL NEW INTERCOSTAL.;[05] APPLIED SEALANT 870C-2. MIXED TIME 2.19.2023 11:45AM; APPLIED TIME 12:00PM 2.19.2023; SQUEEZE OUT TIME 1:45PM 2.19.2023;[06] FINALIZED INSTALLATION ON MAIN CABIN INTERCOSTAL STA 277-294.5 BL0 AT 1:30PM 2.19.2023 REF DWG # 141A5410 AND SRM 51-40-02-0G-0;[07] VERIFIED STEPS 5 AND 6;[08] TASK C/W

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