Service difficulty report · Support · Boeing 7377H4

Difficulty date
February 6, 2023
Submitted
March 9, 2023
Operation
Air carrier
Aircraft
N218WN
Make and model
Boeing 7377H4
Aircraft serial
32489
Aircraft time
58,667 hours, 35,279 cycles
Part
Support
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 R-2 DOOR LOWER SILL SCUFF PLATES SUPPORT INNER CHORD FROM STA 947.75 TO STA 992.8 MKD DOTS<[01] EVALUATED AREA. EXFOLIATED CORROSION PASS THROUGH AT R-2 DOOR LOWER SILL INNER CHORD FOUND OUT OF LIMITS AS PER REFERENCE SRM 53-70-15-1A-1.;[02] REMOVED DAMAGED R2 INNER CHORD AS PER REFERENCE SRM 51-40-02-0G-0;[03] STARTED LOCATE AND DRILL OF NEW R2 INNER CHORD AS PER REFERENCE SRM 51-40-05-0G-0.;[04] LOCATED AND DRILLED NEW R2 INNER CHORD AS PER REFERENCE SRM 51-40-05-0G-0.;[05] VERIFIED STEPS 1; 2; 3 AND 4. OK TO TREAT AND PRIME FASTENER HOLES.;[06] TREATED AND PRIMED FASTENER HOLES AS PER REFERENCE AMM 51-21-41-370-803 AND 51-21-72-370-804;[07] VERIFIED STEP 6. OK TO INSTALL NEW R2 INNER CHORD.;[08] STARTED R2 DOOR LOWER SILL INNER CHORD INSTALLATION AS PER SRM 51-40-02-0G-0 AND DWG 147A8501;[09] CONTINUED R2 DOOR LOWER SILL INNER CHORD INSTALLATION AS PER SRM 51-40-02-0G-0 AND DWG 147A8501;[10] LATE ENTRY: MIXED SEALANT BMS 5-95 AT 20:45 02/10/2023; SQUEEZE OUT AND FASTENERS INSTALLATION VERIFICATION DUE BY 3:45 02/14/2023 PER SOPM 20-50-19.;[11] ACCOMPLISHED INSTALLATION OF R2 DOOR LOWER SILL INNER CHORD AS PER SRM 51-40-02-0G-0 AND DWG 147A8501;[12] VERIFIED STEPS 8;9;10;AND 11 AS FINAL.

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