Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 4, 2022
Operation
Air carrier
Aircraft
N427WN
Make and model
Boeing 7377H4
Aircraft serial
29831
Aircraft time
66,803 hours, 39,311 cycles
Part
Stringer
Condition
Cracked
Location
Fwd Cargo Bay
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 STRINGER 25R BS540 AT FWD CARGO COMPARTMENT 2022-165291 / [01] TOOL USED THICKNESS GAGE: P/N: 45MG; S/N: 130060401; DUE DATE: 22-APR-22.;[02] TOOL USED PN NORTEC 500D SN N500X1693P030456 DUE DATE 26-JAN-23;[03] TOOLS USED: TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811020; DUE DATE: 02-FEB-23; TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811019; DUE DATE: 02-FEB-23.;[04] PERFORMED PERMANENT REPAIR ON STRINGER 25R BTW BS500C AND BS540 IAW B737-700 SRM 53-00-03-2R-1<BR>MATERIAL USED FOR REPAIR PARTS (STRINGER SECTION; CHANNEL AND ANGLES 2 E/A): ALUMINUM SHEETS P/N 7075-T0-0.032 P.O. 2021 238062; P/N 7075-T0-0.036 P.O. 2021 131796. TOOLS USED: CALIPER P/N 500-196-30; S/N A21029144; DUE DUATE 07-OCT-22; RADIUS GAGE P/N 14145; S/N AE-408613; DUE DATE 11-NOV-22.<BR>HEAT TREATED AND CONVERTED FROM 7075T0 TO 7075T6 IAW BAC5602; TABLE IV AND TABLE X. TOOLS USED: TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811020; DUE DATE: 02-FEB-23; TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811019; DUE DATE: 02-FEB-23. <BR>TEMPERATURE: 919 FAHRENHEIT. <BR>TIME: 35 MINUTES.<BR><BR>SEE INDIVIDUAL SIGNS-OFF BELOW;[05] CERTIFIED WORK PERFORMED RII <BR>SEE INDIVIDUAL SIGNOFFS BELOW

More about the Boeing 737-7H4