Service difficulty report · Web · Boeing 7377K9

Difficulty date
August 31, 2022
Submitted
October 5, 2022
Operation
Air carrier
Aircraft
N7879A
Make and model
Boeing 7377K9
Aircraft serial
34321
Aircraft time
51,347 hours, 25,724 cycles
Part
Web
Condition
Corroded
Location
Bs 1016
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 SPOTS ON AFT WET AREA WEB B.S. 1016-1016+15 LBL.2'-24' W.L. 208. (51-003) / [01] REMOVED CORROSION AT AFT WET AREA WEB B.S. 1016-1016+15 LBL.2'-24' W.L. 208 AS PER B737-700 SRM 51-10-02-0G-0;[02] VERIFIED STEP 1;[03] REMOVED L/H AFT WET AREA WEB AT STA 1016 AS PER B737-700 SRM 51-40-02-0G-0;[04] THE L/H AFT WET AREA WEB AT STA 1016 WAS REMOVED DUE TO NOT FINDING DAMAGE LIMIT ON B737-700 SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 SECTION 47 FLOOR STRUCTURAL.;[05] CORRECTION TO STEP 4: WEB IS OUT OF LIMITS AS PER B737-700 SRM 53-70-51-1A-1 (NO DMG PERMITTED TO WEB);[06] LOCATED AND DRILLED NEW WEB PO#1772343 AS PER B737-700 SRM 51-40-05-0G-0;[07] COUNTERSUNK WEB AS REQUIRED AS PER B737-700 SRM 51-40-08-0G-0 AND DWG 147A5600;[08] COMPLETED TABLE MEASUREMENT;[09] VERIFIED STEPS 3; 4; 5; 6; 7 AND 8<BR><BR>OK TO TREAT AND PRIME BARE AREAS;[10] TREATED; PRIMED AND APPLIED CIC ON L/H AFT WET AREA WEB AS PER B737-700 AMM 51-21-41-370-803; 51-21-72-370-804 AND 51-21-91-620-802.;[11] VERIFIED STEP 1;<BR> OK TO INSTALL NEW WEB;[12] INSTALLED L/H AFT WET AREA WEB AT STA 1016 AS PER B737-700 SRM 51-40-02-0G-0 AND DWG NO. 147A5600;[13] VERIFIED STEP 12. TASK COMPLETE.

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