Service difficulty report · Spar Web · Boeing 737824

Difficulty date
September 14, 2019
Submitted
September 17, 2019
Operation
Air carrier
Aircraft
N14249
Make and model
Boeing 737824
Aircraft serial
28809
Aircraft time
61,241 hours, 22,935 cycles
System (JASC)
5711 · Wing Spar
Part
Spar Web
Part number
112A1003209
Condition
Corroded
Location
Wing
Stage of operation
IN
How discovered
V
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

@ WING STA 713, CORROSION ON AFT SPAR WEB. CORROSION MEASURES .75" WIDE X .5" TALL. 1.5" FROM UPPER EDGE OF WEB. .25" FROM NEAREST FASTENER. CORROSION SHOWING. REF SRM 57-20-10. DOCUMENTED DIMENSIONS TO SUBMIT FOR ENGENEERING PER THEIR REQUEST. REMOVED CORROSION DOWN TO APROX .056 DEPTH. STILL HAS SLIGHT BLENDED AREA PER PERFORMED STEPS 4 THRU 8 OF ESC190906-0249-1A. VERIFIED CORROSION REMOVED; PERFORMED ULTRASOUND THICKNESS AND SENT RESULTS TO ENGINEERING; DYE PENETRANT & HFEC INSPECTIONS INDICATED NO CRACKS. REMOVED ALL NECESSARY FASTENERS COMMON TO REPAIR AREA A REF 190906-0249-1C PART A. ESC190906-0249-1C VERIFIED REMOVAL OF FASTENERS TO BEGIN STEP 1 OF PART A ACCOMPLISHED PART "A" STEP 2 ESC190906-0249-1C, PERFORMED INDICATIONS) HFEC HOLE INSPECTION IAW NDT PART 6 51-00-00 PROC 16 (NO CRACK 20-01) OF REWORKED AREA REF ESC190906-0249-1C. VERIFY -1 DOUBLER .100 2024T3 BARE PO#6480381. PERFORMED FLAP PEEN (SOPM 20-10-03), TREATED AND PRIMED (SRM 51- PERFORMED MATERIAL VERIFICATION FOR DOUBLER, PO 6480381 FOR PART A, STEP 4 OF ESC190906-0249-1C. 1C. .080-2024T3 (PO#7307342) AMS-QQ-A-250/4 PER ESC190906-0249- VERIFIED MATERIAL FOR SHIM FABRICATION TO BE MILL DOWN FROM PERFORMED MATERIAL VERIFICATION FOR SHIM PER ESC190906-0249-1C, PART A, STEP 3. PART A STEP 4.C. FLAP PEENED REPAIR A DOUBLER REF ESC190906-0249-1C VERIFIED FLAT PEEN OF REPAIR DOUBLER AS PER ESC190906-0249-1C, PART A, STEP 4C REF ESC190906-0249-1C.