Service difficulty report · Stiffener · Boeing 737752

Difficulty date
April 17, 2023
Submitted
May 22, 2023
Operation
Air carrier
Aircraft
N7835A
Make and model
Boeing 737752
Aircraft serial
34294
Aircraft time
57,926 hours, 30,275 cycles
Part
Stiffener
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

LEFT HORIZONTAL STABILIZER RIB #4 CRACKED AT STIFFENER #4 LOWER SECTION<[01] MIXED SEALANT PS870B2 ON REPAIR PARTS AT 9:30PM 04/22/2023 .SQUEEZE OUT TIME 11:30PM 04/22/2023 AND INSTALLED FASTENERS ON REPAIR PARTS AT L/H HORIZONTAL STAB RIB #4 AS PER REF B/737-700 SRM 55-10-09-2R-4 REPAIR 4 AND SRM 51-40-02-0G-0.;[02] RII -- VERIFIED STEP 1.;[03] REPAIRED LEFT HORIZONTAL STAB. RIB #4 CRACKED AT STIFFENER #4 AS PER SRM 55-10-09-2R-4 REPAIR 4;[04] RII -- VERIFIED LH HORIZONTAL STAB RIB # 4 REPAIR.