Service difficulty report · Spar · Boeing 7377H4

Difficulty date
August 16, 2022
Submitted
September 29, 2022
Operation
Air carrier
Aircraft
N431WN
Make and model
Boeing 7377H4
Aircraft serial
29845
Aircraft time
66,939 hours, 39,408 cycles
System (JASC)
5711 · Wing Spar
Part
Spar
Condition
Corroded
Location
Rt 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

RT WING FRONT SPAR HAS CORROSION AT IB BOOST PUMP UPPER GROUND POINT ATTACH AREA. / [01] REMOVED DAMAGE UPPER SUPPER ANGLE AT RT WING FRONT SPAR BOOST PUMP AREA REF B737-700 SRM 51-40-02-0G-0.;A-3;[27] VERIFIED 24-26.;[28] CAP SEALED FASTENERS COMMON TO TANK INTERNAL AREA PER REF B737 AMM 51-31-00-390-805;[29] CAP SEALED FASTENERS OUTSIDE TO TANK ;UPPER SUPPORT ANGLE AREA PER REF B737 AMM 51-31-00-390-805;[30] VERIFIED 28-29.;[31] REMOVED DAMAGE UPPER SUPPER ANGLE AT RT WING FRONT SPAR BOOST PUMP AREA REF B737-700 SRM 51-40-02-0G-0;REMOVED CORROSION AT RT WING FRONT SPAR UPPER OF BOOST PUMP AREA REF B737-700 SRM 51-10-02-0G-0.REWORKED AREA FOUND TO BE WITHIN LIMITS AND EVALUATED SURFACE ROUGHNESS FOUND TO BE SMOOTHER THAN 125 MICROINCHES RA; TOOL USED B/C#172329 NO DUE DATE REF B737-700 SRM 57-20-10-1A-3; FIG 102 TABLE 101. LOCATED ;DRILLED AND INSTAL NEW SUPPORT ANGLE AND SHIM PER REF B737-700 SRM 57-20-10-1A-3;[32] VERIFIED 31.

More about the Boeing 737-7H4