Service difficulty report · Structure · Boeing 7377H4

Difficulty date
February 11, 2023
Submitted
March 20, 2023
Operation
Air carrier
Aircraft
N216WR
Make and model
Boeing 7377H4
Aircraft serial
32488
Aircraft time
55,381 hours, 33,043 cycles
Part
Structure
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....R/H AFT CABIN FLOOR @ STA 947.5 - STA 992.8 + 6 RBL 57 WL 208.1 INNER CORD HAS CORROSION. (18-41)<[01] FOUND EXFOLIATE CORROSION ON R/H INNER CHORD FROM STA. 947.5 TO STA. 992.8; OUT OF LIMITS PER SRM 53-70-15-1A-1REMOVED R 2 DOOR INNER CHORD; PER REF. SRM 51-40-02-0G-0;[04] VERIFIED STEP 3;[05] LOCATED AND DRILLED NEW INNER CHORD AT R2 DOOR PER REF SRM 51-05-05-OG-0;[06] CORRECTION TO STEP #5; LOCATED AND DRILLED NEW INNER CHORD AT R2 DOOR PER REF SRM 51-40-05-OG-0;OK TO TREAT AND PRIME INNER CHORD HOLES AND A/C STRUCTURE.;[09] TREATED AND PRIMED NEW DRILLED INNER CHORD AND AIRCRAFT AREA PER REF AMM 51-21-41-370-802 AND AMM 51-21-72-370-804;MIXED SEALANT 0870C080BM654SKN40 AT 20:00 0N 02/16/23; VERIFIED SQUEEZE OUTPER REF SOPM 20-50-19TTG8Q00HS5S1;[12] STARTED FASTENERS INSTALLATION ON R2 DOOR INNER CHORD PER REF SRM 51-40-02-0G-0;[13] CORRECTION STEP 11 MIXED SEALANT 0870C080BM654SKN40 AT 20:00 0N 02/16/23; VERIFIED SQUEEZE OUTPER REF SOPM 20-50-19INSTALLED NEW INNER CHORD ON R 2 DOOR FROM STA. 887+6 TO STA. 1016; PER REF. SRM 51-40-02-0G-0 AND DRAWING # 147A8501;[16] LATE ENTRY: FASTENERS 100% INSTALLATION ON NEW INNER CHORD ON R 2 DOOR FROM STA. 887+6 TO STA. 1016; PER REF. SRM 51-40-02-0G-0.FINAL: FOUND EXFOLIATE CORROSION ON R/H INNER CHORD FROM STA. 947.5 TO STA. 992.8; OUT OF LIMITS PER SRM 53-70-15-1A-1; REMOVED AND REPLACED NEW INNER CHORD ON R 2 DOOR FROM STA. 887+6 TO STA. 1016; PER REF. SRM 51-40-02-0G-0 AND DRAWING # 147A8501

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