Service difficulty report · Structure · Boeing 7377H4

Difficulty date
January 2, 2023
Submitted
January 31, 2023
Operation
Air carrier
Aircraft
N213WN
Make and model
Boeing 7377H4
Aircraft serial
34217
Aircraft time
58,853 hours, 35,162 cycles
Part
Structure
Part number
NOTREPORTED
Condition
Corroded
Location
Zn 200 Fus Top
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*** AFT WET AREA FLOOR; R2 DOOR INNER CHORD WITH CORROSION AT NUT PLATE AREA BETWEEN STA 967-986 AND ABOUT RBL-50<[01] EVALUATED AREA AT R2 DOOR INNER CHORD; FOUND EXFOLIATING CORROSION; PASS THROUGH. FOUND OUT OF LIMITS AS PER REFERENCE SRM 53-70-15-1A-1;[02] STARTED REMOVAL OF R2 DOOR INNER CHORD AS PER REFERENCE SRM 51-40-02-0G-0<BR>PERFORMED BY: STEVEN B #19933;[03] REMOVED R2 DOOR LOWER INNER CHORD AS PER REFERENCE SRM 51-40-02-0G-0<BR>PERFORMED BY: STEVEN B #19933;[04] LOCATED AND DRILLED NEW R2 DOOR LOWER INNER CHORD AS PER REF SRM 51-40-05-0G-0<BR>PERFORMED BY V.F 1659;[05] VERIFIED STEPS 1; 2; 3 AND 4.;[06] OK TO TREAT AND PRIME INNER CHORD.;[07] TREATED AND PRIMED INNER CHORD AS PER AMM 51-21-41-370-801 AND 52-21-72-370-804<BR>PERFORMED BY V.F 1659;[08] VERIFIED STEP 7.;[09] OK TO INSTALL NEW R2 DOOR INNER CHORD.;[10] MIXED SEALANT BMS-5-95 80HRS AT 18:30 1/7/2023; SQUEEZE OUT TIME BY 21:30 1/10/2023;[11] STARTING INNER CHORD INSTALLATION AS PER SRM 51-40-02-0G-0 AND DWG 147A8501<BR>PERFORMED BY V.F 1659;[12] COMPLETED INSTALLATION OF R2 INNER CHORD AS PER SRM 51-40-02-0G-0 AND DWG 147A8501;[13] EVALUATED AREA AT R2 DOOR INNER CHORD; FOUND EXFOLIATING CORROSION; PASS THROUGH. FOUND OUT OF LIMITS. REMOVED R2 DOOR LOWER INNER CHORD; LOCATED AND DRILLED NEW R2 DOOR LOWER INNER CHORD; TREATED AND PRIMED INNER CHORD.INSTALLED R2 INNER CHORD AS PER SRM 51-40-02-0G-0 AND DWG 147A8501;[14] VERIFIED STEPS 10; 11; 12 AND 13.

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