Service difficulty report · Angle · Boeing 7377H4

Difficulty date
May 8, 2023
Submitted
June 26, 2023
Operation
Air carrier
Aircraft
N429WN
Make and model
Boeing 7377H4
Aircraft serial
33658
Aircraft time
66,602 hours, 39,316 cycles
Part
Angle
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

L/W #1 TANK FWD BOOST PUMP UPPER BONDING JUMPER ATTACH POINT IS CORRODED ON FRONT SPAR<[01] SRM 57-20-10-1A-3 IS APPLICABLE TO THIS REPAIR.[05] REMOVED CORROSION ON LEFT WING FRONT SPAR AROUND BOOST BUMP UPPER BONDING JUMPER L= 4.6' W = 2.4' IAW SRM 57-20-10-1A-3 ALLOWABLE DAMAGE 3;[06] VERIFIED CORRECTIVE ACTION 5 DAMAGE REMOVED;[07] FLUORESCENT PENETRANT INSPECTION REQUEST AT REWORKED AREA TO ENSURE THAT THERE IS NOT OTHER DAMAGE IAW SRM 57-20-10-1A-3;[08] PT INSPECTED AREA IAW SOPM 20-20-02. <BR>CORROSION NOTED WITHIN BLENDED AREA. MARKED AREAS. <BR>EQUIP USED: <BR>-RADIOMETER ID: ATS2504-A; B; C CAL DUE: 05/23;[09] REMOVED CORROSION ON MARKED AREAS IAW SRM 57-20-10-1A-3;[10] FLUORESCENT PENETRANT INSPECTION REQUEST AT REWORKED AREA TO ENSURE THAT THERE IS NOT OTHER DAMAGE IAW SRM 57-20-10-1A-3;[12] PT INSPECTED AREA IAW SOPM 20-20-02.<BR>NO CORROSION NOTED.<BR>EQUIP USED:<BR>-RADIOMETER ID: ATS2504-A; B; C CAL DUE: 05/23;[13] UT REQUEST TO VERIFY THE REMAINING THICKNESS AT REWORKED AREA. ORIGINAL THICKNESS 0.480'; SEE GRID MAP. ATTACHED 0.250' X 0.250';[15] MEASUREMENT TABLE UPDATED.;[16] REMOVED WING LEADING EDGE DUCT; L/W INBORD LEADING EDGE SECTION PER AMM 36-13-01-000-803;

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