Service difficulty report · Rib · Boeing 7377H4

Difficulty date
June 16, 2023
Submitted
August 14, 2023
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
66,457 hours, 39,411 cycles
Part
Rib
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

L/H HORIZONTAL STABILIZER FRONT SPAR L/E MOVEABLE FAIRING 331B INB INTERNAL RIB # 1 CRACKED RADIUS MKD DOT<[01] REMOVED L/H HORIZ STABILIZER RIB ASSY LE STA 78.29 AS PER B737-700 SRM 51-40-02-0G-0.;[02] REMOVED CRACKED CHORD FROM LH HORIZ RIB ASSY LE 78.29 AS PER B737-700 SRM 51-40-02-0G-0;[03] LOCATED AND DRILLED NEW RIB CHORD PN 186A1352-1 AT LH HORIZ STAB LE STA 78.26 AS PER B737-700 SRM 51-40-05-0G-0;[04] CERTIFIED.;[05] VERIFIED/INSPECTED LOCATED AND DRILL NEW RIB CHORD.<BR>OK TO INSTALL NEW RIB.;[06] REMOVED AND REPLACED CHORD AT L/H HORIZONTAL STAB. LEADING EDGE INNER RIB #1 PER B737-700 SRM 51-40-02-0G-0 AND DRAWING # 186A1301;[07] VERIFIED 6.;[08] RII -- VERIFIED 6.

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