Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 24, 2020
Submitted
July 14, 2020
Operation
Air carrier
Aircraft
N486WN
Make and model
Boeing 7377H4
Aircraft serial
33852
Aircraft time
54,585 hours, 32,477 cycles
Part
Support
Part number
146A7502
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
V
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 TO SIDEWALL SUPPORT AT ACB BS727 TO BS827 LBL21 WL158. REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT ACB BS727-827 LBL21 WL158 IAW SRM 51-10-02. MAX MATERIAL REMOVED IN AREA 2.0' X 1.0' X 0.01' DEPTH FROM ORIGINAL THICKNESS 0.040' OR 25% MATERIAL REMOVED; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2. FABRICATED NEW FLOOR TO SIDEWALL SUPPORT FROM BS 727 - BS 847 LBL21 USING BAC 1496-377 707ST62 LOT 1419996-1 IAW SRM 53-00-53-2R-6 REPAIR 6 AND IAW DWG 146A7502. INSTALLED NEW FLOOR TO SIDEWALL SUPPORT FROM BS 727- 847 LBL21 IAW SRM 53-00-53-2R-6 AND IAW DWG 146A7500.

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