Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
July 1, 2024
Submitted
July 29, 2024
Operation
Air carrier
Aircraft
N8697C
Make and model
Boeing 7378H4
Aircraft serial
36728
Aircraft time
26,284 hours, 12,972 cycles
Part
Floor Support
Condition
Corroded
Location
Zone 100
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

FLOOR SUPPORT MACHINED INTERCOSTAL LOCATED BETWEEN STAS 927-947; LBL 51 HAS CORROSION AT STA 946.<[01] REMOVED FLOOR SUPPORT MACHINED INTERCOSTAL LOCATED BETWEEN STA?S 927-947; LBL 51 PER SRM 51-40-02;[02] REMOVED LIGHT SURFACE CORROSION ON FLOOR SUPPORT MACHINED INTERCOSTAL LOCATED BETWEEN STA?S 927-947; LBL 51. ORIGINAL THICKNESS OF 0.074; MATERIAL REMOVED .001; REMAINING THICKNESS IS 0.073. INTERCOSTAL FOUND TO BE WITHIN LIMITED PER SRM 53-70-51-1A-1.;[03] DISREGARD STEP 2.<BR><BR>REMOVED LIGHT SURFACE CORROSION ON FLOOR SUPPORT MACHINED INTERCOSTAL LOCATED BETWEEN STA?S 927-947; LBL 51. ORIGINAL THICKNESS OF 0.70; MATERIAL REMOVED .023; REMAINING THICKNESS IS 0.047. INTERCOSTAL FOUND TO BE OUT LIMITED PER SRM 53-70-51-1A-1.;[04] LOCATED AND DRILLED FASTENER HOLES ON NEW INTERCOSTAL PER SRM<BR>51-40-05. EXCEPT FASTENER HOLES ATTACHING TO FLOOR STRUCTURAL 947 .;[05] INSTALLED INTERCOSTAL PER SRM 51-40-02.;[06] VERIFIED. LOCATED AND DRILLED FASTENER HOLES ON NEW INTERCOSTAL PER SRM<BR>51-40-05. EXCEPT FASTENER HOLES ATTACHING TO FLOOR STRUCTURAL 947.;[07] RII. VERIFIED INSTALLATION OF INTERCOSTAL LOCATED BETWEEN STA?S 927-947; LBL 51 PER SRM 51-40-02.

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