Service difficulty report · Spar · Boeing 73776Q

Difficulty date
December 20, 2018
Submitted
March 1, 2022
Operation
Air carrier
Aircraft
N7883A
Make and model
Boeing 73776Q
Aircraft serial
30277
Aircraft time
42,875 hours, 27,608 cycles
System (JASC)
5711 · Wing Spar
Part
Spar
Condition
Corroded
Location
Right 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

***CORROSION*** ON AFT SPAR AROUND LOWER BONDING JUMPER AT RIGHT WING BOOST PUMP TANK2 AFT. MARKED / ACESSED HYDRAULIC LINES AS REQUIRED TO BLEND CORROSION ON RT WING AFT SEAL AT BOOST PUMP TANK 2 AFT; IAW AMM 20-10-51-000-801. BLENDED CORROSION; FINAL DIMENSION IS 3.8' X 2.6' X .068' DEEP; REMAINING THICKNESS IS .607' WHICH IS WITHIN ALLOWABLE LIMITS PER BOEING DWG 112A1101 AND SRM 57-20-10-1A-3; FIAR PEENED BLENDED AREA AND RESTORED FINISH PER SOPM 20-10-03; REINSTALLED HYDRAULIC LINES AND PERFORMED SATISFACTORY LEAK CHECK. NO LEAKS NOTED IAW AMM 20-10-51-400-804

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