Service difficulty report · Doubler · Boeing 737752

Difficulty date
July 18, 2023
Submitted
August 17, 2023
Operation
Air carrier
Aircraft
N7887A
Make and model
Boeing 737752
Aircraft serial
35123
Aircraft time
50,547 hours, 26,200 cycles
Part
Doubler
Part number
UNKNOWN
Condition
Cracked
Location
Zn 300 Stabilize
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

LH HORIZONTAL STABILIZER LOWER SKIN - .8' CRACK 18' FROM FWD EDGE ON RIB 193.90<[01] VERIFIED APPLICABILITY OF SRM 55-10-01-2R-11 REPAIR 11.;[02] REMOVED THE DAMAGE AREA OF THE SKIN IAW SRM 55-10-01-2R-11 4. (2) FIG 204/REPAIR 11 DETAIL B AND SRM 51-10-02.<BR><BR>REQUIRE HFEC INSPECTION OF CUT EDGES ON REPAIR AREA FOR CRACKS.;[03] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 1 AND 2.;[04] HFEC INSPECTED BLENDED AREA IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 23.<BR>NO CRACKS NOTED.<BR><BR>HFEC INSPECTED OPEN HOLES IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 16. <BR>NO CRACKS NOTED.<BR><BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 09/23;[05] FABRICATED REPAIR PARTS (1) DOUBLER FROM 2024 T3 CLAD 0.080' LOT # 1523189-2; (2) FILLER FROM 2024 T3 CLAD 0.063' LOT# 1532535-2; APPLIED CHEMICAL CONVERSION COATING IAW SRM 55-10-01-2R-11 OK TO PRIME.;[06] VERIFIED CORRECTIVE ACTION ITEM 5. OKAY TO PRIME PARTS GIVEN.;[07] APPLIED PRIMER TO REPAIR PARTS AND COMMON AREA IAW SRM 55-10-01-2R-11 OK TO INSTALL.;[08] OK TO INSTALL PARTS GIVEN;[09] INSTALLED REPAIR ON L/H HORIZONTAL STAB LOWER SKIN AT STAB STA 193.9 IAW SRM 55-10-01-2R-11;[10] VERIFIED CORRECTIVE ACTION #9;[11] TASK COMPLETE