Service difficulty report · Spar Web · Boeing 737*

Difficulty date
February 14, 2022
Submitted
March 22, 2022
Operation
Air carrier
Aircraft
N457WN
Make and model
Boeing 737*
Aircraft serial
33856
Aircraft time
60,221 hours, 35,821 cycles
Part
Spar Web
Condition
Corroded
Location
Rh 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 TRAILING EDGE REAR SPAR WEB LOCATED BETWEEN WBL 71.24 TO WBL 94.24 IRSS 146 APROX. BOOST PUMP LOWER AREA AT RT WING 2022-80086 / [01] TOOL USED: P/N: NORTEC 600D; S/N: 60009161631; DUE DATE: 03-DEC-22<BR>TOOL USED: P/N: 45MG; S/N: 130060401; DUE DATE: 22-APR-22;[02] TOOL USED PN: FPK-PRO-104; SN: PRO-3448; DUE DATE: 18-NOV-22;[03] REMOVED CORROSION TRAILING EDGE REAR SPAR WEB LOCATED BETWEEN WBL 71.24 TO WBL 94.24 IRSS 146 APROX. BOOST PUMP LOWER AREA IAW B737-700 51-10-02 AND SRM 57-20-10-1A-3 PARAGRAPH 4.A AND PERFORMED VISUAL INSPECTION ON AREA AND NOT FOUND MORE DAMAGE.EVALUATED REWORK AREA AND FOUND WITHIN LIMITS DUE TO MAXIMUM TOTAL CROSS SECTION AREA LOSS IS LESS THAN 0.400 SQUARE INCH AND THE DEPTH OF REMOVED MATERIAL IS LESS THAN 0.100 INCH IAW B737-700 SRM 57-20-10-1A-3 ALLOWABLE DAMAGE 3 PARAGRAPH 4.A(1) FIGURE 102 ZONE 2 DETAIL B TABLE 101.SEE INDIVIDUAL SIGN-OFFS BELOW;[04] TASK CARD COMPLETED <BR>SEE INDIVIDUAL SIGN OFFS BELOW