Service difficulty report · Rib · Boeing 7377H4

Difficulty date
June 8, 2021
Submitted
July 26, 2021
Operation
Air carrier
Aircraft
N441WN
Make and model
Boeing 7377H4
Aircraft serial
29837
Aircraft time
60,855 hours, 35,873 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 120.30 AT 27 INCHES FROM FRONT SPAR AT RT HORIZONTAL STABILIZER ; 2021-269626 / [01] TOOL USED: CALIPER P/N 700-113-10; S/N 0033158; DUE DATE 14-JUL-21.; [02] TOOLS USED: CALIPER P/N 700-113-10; S/N 0033158; DUE DATE 14-JUL-21 AND RADIUS GAUGE P/N S167C; S/N AE-35947; DUE DATE 27-JAN-22; [03] TOOL USED P/N: NORTEC 500D; S/N: N500X1693P030456; CAL DUE DATE: 30-NOV-21; [04] TOOL USED P/N: NORTEC 500D; S/N: N500X1693P030456; CAL DUE DATE: 30-NOV-21; [05] TOOL USED: CALIPER P/N 700-113-10; S/N 0033158; DUE DATE 14-JUL-21.; [06] TOOLS USED: CALIPER P/N 700-113-10; S/N 0033158; DUE DATE 14-JUL-21 AND RADIUS GAUGE P/N S167C; S/N AE-35947; DUE DATE 27-JAN-22; [07] PERFORMED PERMANENT REPAIR INSPAR RIB 120.30 FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4; [08] PERFORMED PERMANENT REPAIR INSPAR RIB 120.30 FROM FRONT SPAR AT RT HORIZONTAL STABILIZER IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 RII

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