Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
April 2, 2022
Submitted
May 4, 2022
Operation
Air carrier
Aircraft
N427WN
Make and model
Boeing 7377H4
Aircraft serial
29831
Aircraft time
66,803 hours, 39,311 cycles
Part
Intercostal
Part number
146A812712
Condition
Corroded
Location
Aft Cargo Bay
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 WEB - INTERCOSTAL LOCATED BETWEEN BS767 TO BS794; RBL 21; WL156 AFT CARGO COMPARTMENT 2022-165323 / [01] TOOL USED: DIGITAL CALIPER P/N:500-196-30 S/N=A20230907 DUE DATE:28-AUG-22.;[02] REPLACED WEB INTERCOSTAL (SHIELD) LOCATED BETWEEN BS767 TO BS794; RBL 21; WL156 AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-02 AND DWG: 146A0081; SHEET: 28; REV: A. P/N: 146A8127-12; P/O: 2022-136144.<BR>SEE INDIVIDUAL SIGN OFFS BELOW;[03] REPLACED WEB INTERCOSTAL (SHIELD) LOCATED BETWEEN BS767 TO BS794; RBL 21; WL156 AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-02 AND DWG: 146A0081; SHEET: 28; REV: A. P/N: 146A8127-12; P/O: 2022-136144. COMPLETED;[04] REPLACED WEB INTERCOSTAL (SHIELD) LOCATED BETWEEN BS767 TO BS794; RBL 21; WL156 AFT CARGO COMPARTMENT IAW B737-700 SRM 51-40-02 AND DWG: 146A0081; SHEET: 28; REV: A. P/N: 146A8127-12; P/O: 2022-136144. COMPLETED RII

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