Service difficulty report · Support · Boeing 7378H4

Difficulty date
January 10, 2023
Submitted
February 2, 2023
Operation
Air carrier
Aircraft
N8519R
Make and model
Boeing 7378H4
Aircraft serial
36910
Aircraft time
20,262 hours, 9,764 cycles
Part
Support
Part number
NOTENTERED
Part serial
NOTENTERED
Condition
Corroded
Location
Zn 100 Fus Lower
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 FLOOR SUPPORT STA 950; RBL 47; WL 208.<[01] SRM 53-70-51-1A-1 IS APPLICABLE ALLOWABLE DAMAGE.;[02] REMOVED CORROSION ON FLOOR SUPPORT STA 950; RBL 47; WL 208 PER SRM 53-70-51-1A-1. REMOVED .016' 1' BY 1' FROM .075'. OUT OF LIMITS PER SRM 53-70-51-1A-1; SRM 51-10-01-0G-0.;[03] VERIFIED CORRECTIVE ACTION 2.;[04] REMOVED FLOOR SUPPORT AT STA 950; RBL30 -RBL 53; WL 208 PER SRM 51-40-02-0G-0;[05] LOCATED AND DRILLED NEW FLOOR SUPPORT AT STA 950; RBL30 -RBL 53; WL 208 PER SRM 51-40-05-0G-0 AND DWG 147A5650. OK TO INSTALL SUPPORT.;[06] VERIFIED CORRECTIVE ACTION STEPS 4 AND 5.;[07] VERIFIED ITEM 5 CORRECTIVE ACTIONS. OK TO INSTALL.;[08] INSTALLED NEW FLOOR SUPPORT AT STA 950; RBL30 - RBL 53; WL 208 PER SRM 51-40-02-0G-0 AND DWG 147A5650.;[09] VERIFIED CORRECTIVE ACTION STEP 8.;[10] VERIFIED CORRECTIVE ACTION 8 AND THE MEASUREMENT TABLE.

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