Service difficulty report · Spar · Boeing 737824

Difficulty date
June 29, 2023
Submitted
June 30, 2023
Operation
Air carrier
Aircraft
N87507
Make and model
Boeing 737824
Aircraft serial
31637
Aircraft time
50,349 hours, 17,552 cycles
System (JASC)
5711 · Wing Spar
Part
Spar
Part number
111A11111
Condition
Cracked
Location
Lbl31.83 - 40.0
Stage of operation
IN
How discovered
O
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

CRACK INDICATION, CENTER WING REAR SPAR OF THE VERTICAL PRESSURE WEB BETWEEN LBL 31.83 AND 40.00. MARKED. TRANSCRIBED FROM HAEC O GSO NR 9282305. ACCOMPLISHED REPAIR IAW B737-800 SRM 57-10-10-2R-3 REPAIR ALTERN ATE 1. REF HAECO GSO MECH V896606 OF SRM 57-10-10-2R-3, THE THRESHOLD IS 56000 FLIGHT CYCLES AFTE FROM THE AFT SIDE, PART [2] FILLER NOT COMMON TO THE FORWARD SID FLANGE OF THE LWR ATTACH ANGLE FROM THE FWD SIDE (ARROW 6) INSTALLATION AND AT AN INTERVAL OF 36000 FLIGHT CYCLES. PART [2] R REPAIR INSTALLATION. INSPECTION METHOD IS HFEC TO INITIAL WEB E (ARROW 2). PART [1] DOUBLER FROM THE FWD SIDE (ARROW4). HORIZ FILLER COMMON TO THE PART (1) ACCOMPLISHED REPAIR IAW SRM 57-10-10-2R-3 REPAIR 3, ALTERNATIVE 1. THIS REPAIR IS A CATEGORY B REPAIR. PER TABLE 204 AND FIG 207 TOMC APPROVED DIP TO ACCOMPLISH HFEC AND LFEC AT 56,000 FLT TOMC-APPROVAL FROM SC1ELBYC COMMENT CYCLES AFTER REPAIR INSTALLATION AND ACCOMPLISH REPEAT INSPECTION AEVERY 36,000 FLT CYCLES AFTER INITIAL INSPECTION ACCOMPLISHED REF SRM 57-10-10-2R-3 TABLE 204 IAW 737 NDT PART 6, 51-00-00, PROCEDURE 4 OR 737 NDT PART 6, DOUBLER FROM THE FWD SIDE (ARROW 3) IAW 737 NDT PART 6, REVIEWED 51-00-00, PROCEDURE 23. AFTER THRESHOLD OF 56000 CYCLES, 51-00-26. THIS INSPECTION WILL REQUIRE FILLET SEALANT REMOVAL, INTERVALS OF 36000 FLIGHT CYCLES IS REQUIRED. LFEC INSPECTION IS AN INSPECTION ALONG UPPER EDGE OF THE INITIAL WEB AND/OR PART REQUIRED AT A THRESHOLD OF 56000 FLIGHT CYCLES AFTER REPAIR [1] DOUBLER AND REAPPL