Service difficulty report · Skin · Boeing 7377H4

Difficulty date
November 4, 2021
Submitted
January 10, 2022
Operation
Air carrier
Aircraft
N770SA
Make and model
Boeing 7377H4
Aircraft serial
30589
Aircraft time
69,290 hours, 41,022 cycles
Part
Skin
Condition
Cracked
Location
Rt Nr 7 Slat
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

#7 SLAT THE LOWER SURFACE OF THE WING LEADING EDGE SLAT NOSE SKIN AT THE ACTUATOR RIBS APPEARS TO BE CRACKED ON THE SKIN AROUND 3RD OB FASTENER THAT ATTACH THE ACTUATOR FITTING AT SLAT STATION 322.71. ; DOT 8-32 / [01] REMOVED ACCESS PANEL 624 DR. AND 1EA. FASTENER FOR NDT. INSPECTION AT R/W. #7 SLAT L/E. NOSE SKIN THAT ATTACH THE ACTUATOR FITTING AT SLAT SAT.322.71. IAW. B-737-700 SRM. 51-40-02-0G-0; [02] PERFORMED HFEC ROTOR INSP ON FASTENER OPEN HOLE. IAW B 737 NDT PART 6 51-00-00 PROCE 16. TOOL NORTEC 600. BC 172389. 7-2-22. NO CRACKS FOUND.; [03] PERFORMED HFEC COUNTERSINK INSP ON FASTENER OPEN HOLE. IAW B 737 NDT PART 6 53-30-00 PROCE 4. TOOL NORTEC 600. BC 172389. CALIB DUE 7-2-22. CRACK INDICATION FOUND.; [04] VERIFIED 1.; [05] REMOVED ACCESS PANEL#624EB; 624CB; AND FLEX PANEL AT R/W. SLAT #7 IAW. B-737-700 SRM. 51-40-02-0G-0; [06] CUT-OUT DAMAGE AREA IAW. B-737-700 SRM. 57-42-01-2R-8 FIGURE 202 PAGE 7; [07] PERFORMED HFEC INSP ON CUTOUT AREA. IAW B 737 NDT PART 6 51-00-00 PROCE 23. TOOL NORTEC 600. BC 166316. CALIB DUE 10-8-22. NO CRACKS FOUND.; [08] PERFORMED HFEC ROTOR INSP ON FASTENERS OPEN HOLES NEAR TO CUTOUT AREA. IAW B 737 NDT PART 6 51-00-00 PROCE 16. TOOL NORTEC 600. BC 166316. NO CRACKS FOUND.; [09] PERFORMED HFEC COUNTERSINK INSP ON FASTENERS OPEN HOLES NEAR TO CUTOUT AREA. IAW B 737 NDT PART 6 53-30-00 PROCE 3. TOOL NORTEC 600. BC 166316. NO CRACKS FOUND.; [10] FABRICATED REPAIR PART IAW. B-737-700 SRM.57-42-01-2R-8 FIGURE 202;

More about the Boeing 737-7H4