Service difficulty report · Spar · Boeing 7377H4

Difficulty date
June 21, 2021
Submitted
August 3, 2021
Operation
Air carrier
Aircraft
N419WN
Make and model
Boeing 7377H4
Aircraft serial
29824
Aircraft time
64,912 hours, 38,308 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

CORROSION FRONT SPAR WEB LOCATED FUEL BOOST PUMP IFSS 120 APROX. AND WBL 94.24 AT RT WING ; 2021-295211 / [01] TOOL USED P/N: NORTEC 600D; S/N2000053402; DUE DATE: 23-APR-22; [02] TOOL USED: ULTRASONIC THICKNESS GAUGE; PN:38DL PLUS; SN: 120398603; DUE DATE: 22-JUL-21; [03] SUMMARY EA 21-157-01868 HAS BEEN APPROVED; ACTIVATED; AND ADDED AS A SUBTASK TO FAULT TTG8Q005J844.; [04] REPAIRED RH WING - FRONT SPAR WEB - AT IFSS 120.00 - AT FUEL BOOST PUMP FAYING SURFACE IAW SRM B737-700 SRM 57-20-10-1A-3; EA# 21-157-01868-WIP1 BARCODE TTG8Q005PLM5 AND EA# 21-157-01868 BARCODE TTG8Q005RA9Q; [05] REPAIRED RH WING - FRONT SPAR WEB - AT IFSS 120.00 - AT FUEL BOOST PUMP FAYING SURFACE IAW SRM B737-700 SRM 57-20-10-1A-3; EA# 21-157-01868-WIP1 BARCODE TTG8Q005PLM5 AND EA# 21-157-01868 BARCODE TTG8Q005RA9Q VERIFIED AS RII.

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