Service difficulty report · Skin · Boeing 7377H4

Difficulty date
May 16, 2022
Submitted
June 8, 2022
Operation
Air carrier
Aircraft
N248WN
Make and model
Boeing 7377H4
Aircraft serial
32509
Aircraft time
53,726 hours, 32,221 cycles
Part
Skin
Condition
Corroded
Location
Fuselage
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

CORROSION EXTERNAL SKIN LOCATED BETWEEN BS 1016 AND BS 1040 BETWEEN S-3R AND S-3L WL308.5 AT UPPER FUSELAGE 2022-283998 / [01] TOOL USED: EDDY CURRENT EQUIPMENT; P/N: NORTEC600D; S/N: 60007161486; CAL DUE DATE: 06-DEC-22;[02] TOOL USED: ULTRASONIC THICKNESS GAGE; P/N: 45MG; S/N: 130066401; CAL DUE DATE: 17-JUN-22;[03] REMOVED CORROSION ON EXTERNAL SKIN LOCATED BETWEEN BS 1016 AND BS 1040 BETWEEN S-3R AND S-3L WL308.5 AT UPPER FUSELAGE IAW B737-700 SRM 51-10-02-0G-0; AND EVALUATED REWORKED AREA POINT 1; POINT 2; POINT 4 AND POINT 5 FOUND WITHIN LIMITS IAW B737-700 SRM 53-00-01-1A-1 ALLOWABLE DAMAGE 1 PARAGRAPH 4.C.(2)(A) FIGURE 103 DETAIL D EXCEPT POINT 3 THAT IS OUT LIMITS MUST BE REPAIRED; REPAIR DOCUMENTED ON TTG8Q00CNEGC.<BR>SEE INDIVIDUAL SIGN OFFS BELOW.;[04] CORRECTED STEP 3<BR>REMOVED CORROSION ON EXTERNAL SKIN LOCATED BETWEEN BS 1016 AND BS 1040 BETWEEN S-3R AND S-3L WL308.5 AT UPPER FUSELAGE IAW B737-700 SRM 51-10-02-0G-0; AND EVALUATED REWORKED AREA POINT 1; POINT 2; POINT 4 AND POINT 5 FOUND WITHIN LIMITS IAW B737-700 SRM 53-00-01-1A-1 ALLOWABLE DAMAGE 1 PARAGRAPH 4.C.(2)(A) FIGURE 103 DETAIL D; NO FURTHER ACTION OR INSPECTION REQUIRED. EXCEPT POINT 3 THAT IS OUT LIMITS MUST BE REPAIRED; REPAIR DOCUMENTED ON TTG8Q00CNEGC.<BR>SEE INDIVIDUAL SIGN OFFS BELOW.;[05] CERTIFIED STEP 4 COMPLETED

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