Service difficulty report · Skin · Boeing 7377H4

Difficulty date
July 1, 2023
Submitted
August 4, 2023
Operation
Air carrier
Aircraft
N228WN
Make and model
Boeing 7377H4
Aircraft serial
32496
Aircraft time
58,313 hours, 35,117 cycles
Part
Skin
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

CRACK INDICATION FOUND ON RH HORIZONTAL STABILIZER LOWER IN-SPAR SKIN AT STATION 193.90 RIB; 25.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB. CRACK LENGTH IS 0.773 INCHES 2023-422271<[01] TOOL USED: EDDY CURRENT EQUIPMENT; P/N: NORTEC600D; S/N: 60009161631; CAL DUE DATE: 31-JAN-24;[02] TOOL USED EDDY CURRENT EQUIPMENT PN: NORTEC500D; SN: N500X12101U102020 DUE DATE: 30 AUG 23.;[03] TOOL USED: EDDY CURRENT EQUIPMENT; P/N: NORTEC 500D; S/N: N500X11290U021704; DUE DATE: 12 MAR 24.;[04] PERFORMED REPAIR ON RH HORIZONTAL STABILIZER LOWER IN-SPAR SKIN AT STATION 193.90 RIB; 25.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB IAW EA# 23-155-02228 WIP1 AND EA COVER # 23-155-02228 SEE INDIVIDUAL SIGN OFFS BELOW;[05] CORRECTED STEP 4 : PERFORMED REPAIR ON RH HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STATION 193.90 RIB; 25.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB IAW EA# 23-155-02228 WIP1 AND EA COVER # 23-155-02228 SEE INDIVIDUAL SIGN OFFS BELOW;[06] PERFORMED REPAIR ON RH HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STATION 193.90 RIB; 25.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB IAW EA# 23-155-02228 WIP1 AND EA COVER # 23-155-02228 SEE INDIVIDUAL SIGN OFFS BELOW;[07] CORRECTED STEP 6: PERFORMED REPAIR ON RH HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STATION 193.90 RIB; 25.500 INCH FROM FRONT SPAR; INBD SIDE OF RIB IAW EA# 23-155-02228 WIP1 AND EA COVER # 23-155-02228 SEE INDIVIDUAL SIGN OFFS BELOW ITEM RII

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