Service difficulty report · Intercostal · Boeing 7378H4

Difficulty date
July 12, 2023
Submitted
August 1, 2023
Operation
Air carrier
Aircraft
N8544Z
Make and model
Boeing 7378H4
Aircraft serial
36926
Aircraft time
19,891 hours, 9,804 cycles
Part
Intercostal
Part number
UNKNOWN
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

CABIN FLOOR INTERCOSTAL HAS 2EA CRACKS AT FASTENER HOLES AT BS387 AND BS394 LBL14<[01] PROCURED REPLACEMENT PART #143A5410-174 FROM ADVANTAGE AVIATION; CUSTOMER PO #P7395685; WORK ORDER #MS55414.;[02] REMOVED CRACKED CHORD PER SRM 51-40-02. FORMED REPLACEMENT BAC1490-2843 7075-O CLAD SECTION PER BOEING DWG 143A5410 SHEET 139.;[03] PART SENT TO ADVANTAGE AVIATION FOR HEAT TREAT TO T-6 CONDITION PER BOEING DRAWING #143A5410. CUSTOMER PO #P7395685; WORK ORDER #MS55414.;[04] REMOVED CRACKED CHORD PER SRM 51-40-02. FORMED REPLACEMENT BAC1490-2843 7075-O CLAD SECTION PER BOEING DWG 143A5410 SHEET 139 AND SMAL GRANTED FOR PN # 143A5410U174 BOEING CONTROL # 270827463.;[05] REMOVED CRACKED CHORD PER SRM 51-40-02. FORMED REPLACEMENT BAC1490-2843 7075-O CLAD SECTION PER BOEING DWG 143A5410 SHEET 139 AND SMAL GRANTED FOR PN # 143A5410U174 BOEING CONTROL # 270827463. NEW PART FORMED ON 07/14/2023 @ 13:00 HRS.;[06] COMPLIED WITH INSPECTION AT DATE STATED ; REMOVED CRACKED CHORD PER SRM 51-40-02.LOCATED AND DRILLED REPLACEMENT CHORD PER SRM 51-40-05. ALODINED AND PRIMED REPLACEMENT CHORD PER SRM 51-20-01 AND BOEING DRAWING #143A5410. INSTALLED REPLACEMENT CHORD PER SRM 51-40-02.;[08] RII; COMPLIED WITH INSPECTION; LOCATED AND DRILLED REPLACEMENT CHORD PER SRM 51-40-05. ALODINED AND PRIMED REPLACEMENT CHORD PER SRM 51-20-01 AND BOEING DRAWING #143A5410. INSTALLED REPLACEMENT CHORD PER SRM 51-40-02.

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