Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 10, 2023
Operation
Air carrier
Aircraft
N965WN
Make and model
Boeing 7377H4
Aircraft serial
36677
Aircraft time
38,362 hours, 23,630 cycles
Part
Intercostal
Part number
UNKNOWN
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+5 RBL50 WL208.<[01] REQUEST HFEC INSPECTION OF SUSPECTED CRACK AREA.;[02] HFEC INSPECTED SUSPECTED CRACK AREA IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 23.<BR>.3' CRACK NOTED. MARKED LOCATION<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 09/23;[03] UPDATED MEASUREMENT TABLE.<BR>INSTALLED EWIS/FOD PROTECTION IN REPAIR AREA BS 344-380; RBL 45 - RBL 65; WL 204 PER AMM 20-60-07.;[04] CUT OUT THE DAMAGE AT BS344+5 RBL50 WL208 PER SRM 53-10-51-2R-6 4. C. FIG. 202.;[05] RECEIVED 1 EA HFAB53-FTG-012 FITTING P0# 929560/1;[06] REQUEST NDI FOR FREE CRACK CONDITION;[07] VERIFIED CORRECTION ACTION; ITEM NO. 4 & 5; COMPLETED.;[08] HFEC INSPECTED CUT OUT AREA IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 23.<BR>NO CRACKS NOTED.<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 09/23;[09] FABRICATED REPAIR PARTS [1] FILLER FROM CLAD 7076T6 0.063' LOT# 1498631-1; [5] FILLER FROM CLAD 7076T6 0.020' LOT# 1353253-2; [7] FITTING HFAB53-FTG-012 FITTING P0# 929560/1 PER SRM 53-10-51-2R-6;[11] FABRICATED [6] FITTING HFAB53-FTG-012COSTUMER RO#929498-SWA.;[12] UPDATED STEP 1;[13] VERIFIED CORRECTIVE ACTIONS 9;10;11 AND 12 COMPLETE.;[14] FABRICATED [3] REPAIR ANGLE FROM 60-5872#7075T6 LOT #509308-1 PER SRM 53-10-51-2R-6 FIG. 203 DETAIL D. APPLIED CHEMICAL CONVERSION COATING TO REPAIR PART PER SRM 53-10-51-2R-6. AMM 51-21-41-370-802.

More about the Boeing 737-7H4