Service difficulty report · Frame · Boeing 737924ER

Difficulty date
June 27, 2019
Submitted
June 30, 2019
Operation
Air carrier
Aircraft
N75436
Make and model
Boeing 737924ER
Aircraft serial
33531
Aircraft time
33,902 hours, 11,659 cycles
Part
Frame
Part number
146A128565
Condition
Cracked
Location
Bs 847
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

FUSELAGE FRAME CRACKED AT STA.847 AT BETWEEN S-27L AND S-27R. FABRICATED -1 REPAIR J. PERFORMED FLOURESCENT PEN. INSP. ON FORM VERIFIED PO#8852031 AND METAL .80-7175-0 C/W FPI IAW SOPM 20-20- 2 ON FORMED AREA. IAW AVO ESC1906120436-1 ITEM #5 NO DEFECTS NOT ED. TRIMMED OUT FRAME WEB CRACK IN REFERENCE TO AVO ESC1906120436-1A 5.A. 36-1A STEPS 5.B AND STEP 7. PERFORMED HFEC INSP. OF FRAME WEB AND CUTOUT PER AVO ESC19061204 PERFORMED HFEC HOLE PROBE INSP. OF REMOVED FASTENERS PER AVO ESC 1906120436-1A STEP 3. ACCOMPLISHED STEPS 3 , 5B AND 7 OF AVO#1906120436-1A ALL HFEC S TEPS ,NO LIMITING DEFECTS FOUND. PERFORMED .040 INSURANCE CUT, STEP 5.B OF AVO ESC1906120436-1A HFEC''S ACCOMPLISHED FOR FRAME WEB (STA 847) PER AVO ESC190612043 6-1A FOR STEP''S 3&5B&7 PER 737 NDT PART 6,51-00-00 #23 & #16. NO DEFECTS NOTED AFTER INSURANCE CUT. MATERIAL VERIFICATION OF -1 REPAIR ANGLE IS CLAD .071 7075-0 PER CURRENT AVO ESC1906120436-1B. STEP B.1A. PO OF-1 .071 CLAD 7075 REPAIR ANGLE IS 5417049317. MATERIAL VERICATION ACP ON STRUCTURAL REPAIR ANGLE PER AVO ESC19 0613-0436-1A NOTE B1. FORMED REPAIR ANGLE -1 PER AVO ESC1906120436-1B STEP B.1.B VERIFIED FORMED REPAIR ANGLE -1 STEP B.1.B., FPI ACCOMPLISHED PE R B.1.NOTE,PER AVO ESC1906120436-1C. REPAIR ANGLE -1 HEAT TREATED TO -T62 CONDITION AFTER FORMING REFERENCE HEAT TREAT FORM 43-0150 N