Service difficulty report · Intercostal · Boeing 7377Q8

Difficulty date
March 8, 2023
Submitted
April 4, 2023
Operation
Air carrier
Aircraft
N7819A
Make and model
Boeing 7377Q8
Aircraft serial
30649
Aircraft time
65,235 hours, 39,673 cycles
Part
Intercostal
Condition
Corroded
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

CORROSION ON AFT CARGO BAY INTERCOSTAL BS 787+9 RBL 6 WL 153<[01] EVALUATED CORROSION ON INTERCOSTAL BS 787+9 RBL 6 WL 153; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-0-0G-0;[02] VERIFIED CORRECTIVE ACTIONS STEP 1.;[03] REMOVED AFT CARGO BAY INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-05-0G-0; AND DWG 146A8130. OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4.<BR>OK TO INSTALL;[06] INSTALLED INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-02-0G-0; AND DWG 146A8130.;[07] VERIFIED ITEM 6 CORRECTIVE ACTIONS.;[08] VERIFIED MEASUREMENTS.

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