Service difficulty report · Skin · Boeing 7378H4

Difficulty date
July 19, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N8546V
Make and model
Boeing 7378H4
Aircraft serial
63574
Aircraft time
19,785 hours, 9,786 cycles
Part
Skin
Part number
UNKNOWN
Condition
Corroded
Location
Zn 500 Left Wing
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

DOOR 532JB FUEL ACCESS HOLE O/B LEFT WING LOWER AREA WITH CORROSION ON FLANGE OUTER SURFACE.<[01] REMOVED CORROSION FROM 532JB FUEL ACCESS HOLE O/B LEFT WING LOWER AREA ON FLANGE OUTER SURFACE PER SRM 57-20-01-2R-1.;[02] VERIFIED STEP 1;[03] REWORKED AREA TO 63 MICROINCHES SMOOTH; AND MEASURED REMAINING MATERIAL: .203'; FOUND TO BE WITHIN LIMITS PER SRM 57-20-01-2R-1 FIG 203 DETAIL A TOOLS USED B/C 175310 CAL DUE 26-MAY-24 AND B/C 171855 NO DUE DATE.;[04] CORRECTION STEP 3: REWORKED AREA TO 63 MICROINCHES SMOOTH; AND MEASURED REMAINING MATERIAL: .197'; FOUND TO BE WITHIN LIMITS PER SRM 57-20-01-2R-1 FIG 203 DETAIL A TOOLS USED B/C 175310 CAL DUE 26-MAY-24 AND B/C 171855 NO DUE DATE.;[05] VERIFIED STEP 4;[06] FLAP PEEN THE AREA AND APPLIED CHEMICAL CONVERSION COATING TO AREA AS PER SRM 57-20-01-2R-1.;[07] REMOVED LIGHT CORROSION AT DOOR 532JB FUEL ACCESS HOLE O/B FLANGE OUTER SURFACE AND REWORKED AREA TO 63 MICROINCHES MIN. REMAINING MATERIAL FOUND WITHIN LIMITS; AREA WAS FLAP PEENED AND CHEMICAL CONVERSION COATING APPLIED AS PER SRM 57-20-01-2R-1.;[08] VERIFIED LIGHT CORROSION REMOVAL AT DOOR 532JB FUEL ACCESS HOLE O/B FLANGE OUTER SURFACE AND REWORKED AREA TO 63 MICROINCHES MIN. REMAINING MATERIAL FOUND WITHIN LIMITS; AREA WAS FLAP PEENED AND CHEMICAL CONVERSION COATING APPLIED.

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