Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 10, 2023
Submitted
April 18, 2023
Operation
Air carrier
Aircraft
N281WN
Make and model
Boeing 7377H4
Aircraft serial
36528
Aircraft time
51,516 hours, 31,045 cycles
Part
Intercostal
Condition
Cracked
Location
Zn 100 Fus Lower
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

CRACKED INTERCOSTAL AT FWD CABIN BS344+6 LBL11 WL208.<[01] REQUEST NDI TO VERIFY DAMAGE.[11] 7075-T6 CLAD SHEET#0.080 LOT#1492623-1.<BR>IAW SRM 53-10-51-2R-10 PART 4.H TO 4.L FIG.205; REFER TO EA 23-153-01114-WIP1 STEPS 10-13; SRM 51-40-05-0G-0.;[12] UPDATE STEP 10.<BR>LOT#1506465-1 ANGLE FITTING REPAIR.;[13] VERIFIED CORRECTIVE ACTIONS STEP 11.;[14] STEPS 10;12 VERIFIED.;[15] INSTALLED REPAIR PARTS IAW EA#23-153-01114-WIP1 AND IAW SRM 53-10-51-2R-10 REPAIR 10 AND PER DWG#141A5400;[16] RII VERIFIED CORRECTIVE ACTION ITEM 15 COMPLETE.;[17] MEASUREMENT FIELD ITEM 5 'MINOR' INCORRECT; THIS IS A MAJOR REPAIR.;[18] CORRECTED MEASUREMENT FIELD 5; CHANGED TO MAJOR REPAIR.;[19] VERIFIED CORRECTIVE ACTION ITEM 18;[20] CRACKED INTERCOSTAL AT FWD CABIN BS 344+6 LBL11 WL208 WAS REPAIRED IAW EA 23-153-01114;[21] VERIFIED MEASUREMENT TABLE. VERIFIED CORRECTIVE ACTON 20

More about the Boeing 737-7H4