Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
May 2, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N285WN
Make and model
Boeing 7377H4
Aircraft serial
32536
Aircraft time
51,630 hours, 31,054 cycles
Part
Floorbeam
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 BS 986 FLOOR BEAM FWD FLANGE LBL 14.5 WL 208.<[01] SRM 53-70-51-1A-1 IS APPLICABLE ALLOWABLE DAMAGE; UPDATED TABLE;[02] REMOVED CORROSION ON 986 FLOORBEAM FWD FLANGE AT LBL 14.5; WL 208 PER SRM 51-10-02-0G-0. MAX MATERIAL REMOVED WAS .011' 1.8' BY 1'. FROM .150'. OUT OF LIMITS PER SRM 53-70-51-1A-1. MEASURED REMAINING THICKNESS USING SPHERICAL MICROMETER; ID# IS000461; NSN; DUE 02/29/24.;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2.;[04] UPDATED MEASUREMENT TABLE ITEM 14.<BR>VERIFIED COMPLETION OF EA M-21-153-00612; ON TASK ID TTG8Q00KVH62; DOCUMENTING NDI OF REWORKED ARE AND RESTORATION OF PROTECTIVE FINISH.;[05] VERIFIED MEASUREMENT TABLE;[06] VERIFIED ALL STEPS COMPLETE

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