Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
December 7, 2023
Submitted
January 15, 2024
Operation
Air carrier
Aircraft
N8562Z
Make and model
Boeing 7378H4
Aircraft serial
64171
Aircraft time
19,397 hours, 9,806 cycles
Part
Floor Support
Part number
UNKNOWN
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

AFT PASSENGER COMPARTMENT FLOOR STRUCTURE HAS EVIDENCE OF CORROSION AT INTERCOASTAL STA 947 LBL 24<[01] REMOVED L ANGLE REMOVED CORROSION AT BS 927-947 LBL 24 FOUND OUT OF LIMIT IAW SRM 53-70-51-1A-1;[02] REJECT: FAULT HAS 4 ERRORS PRESENT:<BR><BR>1. CORRECTIVE ACTION #1 HAS INCORRECT REFERENCE NOTED FOR ALLOWABLE LIMITS WHICH SHOULD BE SRM 53-70-51-0I-2 FOR THIS AREA AS THIS COVERS THE SPECIFIC INTERCOSTAL LISTED IN FAULT DETAIL.<BR><BR>2. MEASUREMENT SECTION ITEM #3 IS ENTERED AS FAILURE TYPE NO WHEN THE FAILURE TYPE FOR THIS FAULT IS LISTED AS 03 CP AND THEREFORE SHOULD BE ANSWERED AS YES.<BR><BR>3. MEASUREMENT SECTION ITEM #23 HAS THE CORROSION LEVEL LISTED AS LEVEL 1; HOWEVER CORROSION FOUND AS OUT OF LIMITS SHOULD BE LISTED AS LEVEL 2. SEE MPM GLOSSARY UNDER 'CPCP LEVEL 2 CORROSION' FOR DEFINITIONS.<BR><BR>4. MEASUREMENT ITEM #22 IS LISTED AS NO; BUT SHOULD BE LISTED AS YES DUE TO FINDING OF OUT OF LIMITS NOTED IN CORRECTIVE ACTION #1 AND FAULT SHOULD HAVE PICTURE OF CORROSION ATTACHED. SEE MPM GLOSSARY UNDER 'CPCP LEVEL 2 CORROSION' FOR DEFINITIONS.;[03] REFERENCING REJECTION NOTED IN CORRECTIVE ACTION #2:<BR>INSPECTION CONFIRMS THAT ISSUE ITEMS #2; #3 AND #4 HAVE BEEN CORRECTED. ISSUE ITEM #1 WAS REJECTED IN ERROR AS THE REFERENCE USED IN CORRECTIVE ACTION #1 WAS CORRECT. REMOVED AND REPLACED L ANGLE BS 927-947 LBL 24 PER SRM 51-40-02;[08] C/W INSPECTION;[09] C/W INSPECTION

More about the Boeing 737-8H4