Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
March 7, 2023
Submitted
April 12, 2023
Operation
Air carrier
Aircraft
N956WN
Make and model
Boeing 7377H4
Aircraft serial
36672
Aircraft time
38,869 hours, 23,696 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 AT NUTPLATE LOCATION BS 986; RBL 42.5; WL 208<[01] VERIFIED APPLICABILITY FOR SRM 53-70-51-1A-1<BR>REMOVED NUT PLATE AND FOUND CORROSION AT FLOOR BEAM AT BS 986; RBL 42.5; WL 208. EVALUATED AND FOUND FLOOR BEAM OUT LIMITS PER SRM 53-70-51-1A-1.;[02] VERIFIED APPLICABILITY FOR SRM 53-70-51-1A-1<BR>REMOVED NUT PLATE AND FOUND CORROSION AT FLOOR BEAM AT BS 986; RBL 42.5; WL 208. REMOVED CORROSION WITH NEXT MEASUREMENTS L:1' W: .80' D: .060' AND FOUND FLOOR BEAM OUT LIMITS PER SRM 53-70-51-1A-1. USED TOOL ID: ATS2678 DUE: 02/29/24.;[03] VERIFIED APPLICABILITY FOR SRM 53-70-51-1A-1<BR>REMOVED NUT PLATE AND FOUND CORROSION AT FLOOR BEAM AT BS 986; RBL 42.5; WL 208. REMOVED CORROSION WITH NEXT MEASUREMENTS L:1' W: .80' D: .057' AND FOUND FLOOR BEAM OUT LIMITS PER SRM 53-70-51-1A-1. USED TOOL ID: ATS2678 DUE: 02/29/24.;[04] CERTIFIED CORRECTIVE ACTION 1;2; 3;[05] VERIFIED CORRECTIVE ACTION 3;[06] REQUEST NDI TO HFEC ALL NUT PLATE HOLES AND EXISTING HOLES IN REPAIR AREA PER SRM 53-70-51-2R-6 STEP 4-D;[07] HFEC INSPECTED EXISTING HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16.<BR>DEFECTS FOUND TO REMAIN IN HOLES; MARKED LOCATIONS.<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 09/23;[08] UPDATED STEPS 1 TO 5;[09] UPDATED STEPS 1 TO 6.;[10] TO BE REPAIRED ON FAULT TTG8Q00JD3C3;[11] VERIFIED CORRECTIVE ACTION ITEM 8-10.;[12] MEASUREMENT TABLE VERIFIED;[13] TASK COMPLETE

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