Service difficulty report · Rib · Boeing 7377H4

Difficulty date
August 3, 2021
Submitted
September 10, 2021
Operation
Air carrier
Aircraft
N754SW
Make and model
Boeing 7377H4
Aircraft serial
29849
Aircraft time
74,935 hours, 44,224 cycles
Part
Rib
Condition
Cracked
Location
Horizontal Stab
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

CRACK INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER ; 2021-368397 / [01] TOOK MEASURE OF CRACK INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IS L: 0.435 NO FOUND ALLOWABLE DAMAGE ON SRM MUST BE REPAIR .; [03] STEP 2 COMPLETE; [04] PERFORMED CUT AND REMOVED THE DAMAGE FROM VERTICAL STIFFENER AND WEB OF THE INSPAR RIB LOC . INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER. I.A.W B737-700 SRM 55-10-09-2R-4 REPAIR 4 . [05]PERFORMED CUT AND REMOVED THE DAMAGE FROM LOWER CORD OF THE INSPAR RIB . LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER. I.A.W B737-700 SRM 55-10-09-2R-5 REPAIR 5 . [12] MARKED HAND LAY OUT ON REPAIR AREA INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-09-2R-5 REPAIR 5 FIGURE 204; [14]MADE AND DRILLED REPAIR PARTS T-SECTION (1E/A) ANGLE (1E/A) AND SHIM (2E/A) AND FILLER (1E/A) OF INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-09-2R-5 REPAIR 5 TABLE 201 FIGURE 204. AND SRM 51-40-05. [22] INSTALLED REPAIR PARTS T-SECTION (1E/A) ANGLE (1E/A) AND SHIM (2E/A) AND FILLER (1E/A) AND FASTENERS ON INSPAR RIB LOCATED STAB STA 120.30 AT 28 INCH FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-09-2R-5 REPAIR 5 TABLE 201 FIGURE 204; AND B737-700 SRM 51-40-0

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