Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
April 23, 2022
Submitted
May 19, 2022
Operation
Air carrier
Aircraft
N474WN
Make and model
Boeing 7377H4
Aircraft serial
33861
Aircraft time
59,626 hours, 35,442 cycles
Part
Intercostal
Part number
147A85408
Condition
Corroded
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 INNER CHORD LOCATED BTW BS 967 TO BS 986.5 AT LEVEL FLOOR STRUCTURE RBL 64 AND WL 208.1 AFT GALLEY AREA 2022-211515 / [01] TOOL USED ULTRASONIC EQUIPMENT PN: 35DL; SN: 091419910; DUE DATE: 26 JAN 23.;[02] REPLACED INNER CHORD LOCATED BETWEEN BS887 TO BS1006;RBL64 AND WL208.1 AFT GALLEY. IAW B737-700 SRM 51-10-02 ITEM 9;SRM 51-40-02 AND DWG 147A8501 REV B;[03] CORRECTIVE STEP 2:<BR>REPLACED INNER CHORD LOCATED BETWEEN BS887 TO BS1006;RBL64 AND WL208.1 AFT GALLEY. IAW B737-700 SRM 51-10-02 ITEM 9;SRM 51-40-02 AND DWG 147A8501 REV B<BR>SEE INDIVIDUAL SIGN OFF BELOW;[04] CERTIFIED RII WORK PERFORMED. <BR>SEE INDIVIDUAL SIGNOFFS BELOW.

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