Service difficulty report · Web · Boeing 7377H4

Difficulty date
February 10, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N277WN
Make and model
Boeing 7377H4
Aircraft serial
32531
Aircraft time
51,901 hours, 31,206 cycles
Part
Web
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

MAIN CABIN AFT WET AREA FLOOR WEB CORROSION AT LBL 7' STA 1060+11' MAIN CABIN AFT WET AREA FLOOR WEB CORROSION AT LBL 7' STA 1006+11'<[01] FOUND EXFOLIATING CORROSION TO BE OUT OF LIMITS REF SRM 51-70-15-1A-1. PART NEEDS REPLACEMENT.;[02] REMOVED FLOOR WEB AT MAIN CABIN AFT WET AREA AT STA 1060+11' AND LBL 7' REF SRM 51-40-02-0G-0;[03] LOCATED; DRILLED AND COUNTERZUNK HOLES AT AFT WET AREA NEW FLOOR WEB REF 51-40-05-0G-0;[04] VERIFIED STEPS 1;2;3;[05] OK TO INSTALL WEB.;[06] PARTIALLY INSTALLED NEW FLOOR WEB AT MAIN CABIN AFT WET AREA AT STA 1060+11' AND LBL 7' REF SRM 51-40-02-0G-0 AND DWG 147A5600.<BR><BR>SEALANT INFORMATION: MIXED TIME 17:00PM 02-17-2023; APPLIED SEALANT TIME 18:30PM 02-17-2023 AND SQUEZZE TIME 01:00AM 02-21-2023;[07] INSTALLED NEW FLOOR WEB AT MAIN CABIN AFT WET AREA AT STA 1006+11' REF SRM 51-40-02-0G-0 AND DWG 147A5600.;[08] CORRECTION STEP 2: REMOVED FLOOR WEB AT MAIN CABIN AFT WET AREA AT STA 1006+11' AND LBL 7' REF SRM 51-40-02-0G-0;[09] CORRECTION STEP 6: PARTIALLY INSTALLED NEW FLOOR WEB AT MAIN CABIN AFT WET AREA AT STA 1006+11' AND LBL 7' REF SRM 51-40-02-0G-0 AND DWG 147A5600.<BR><BR>SEALANT INFORMATION: MIXED TIME 17:00PM 02-17-2023; APPLIED SEALANT TIME 18:30PM 02-17-2023 AND SQUEZZE TIME 01:00AM 02-21-2023;[10] VERIFIED STEPS 7 AND 8. CORRECTION TO STEPS 2 AND 6.;[11] VERIFIED STEPS 6 AND 7. INSTALLATION OF THE NEW FLOOR WEB.

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